Online English Vocabulary Flashcards for TOEFL 13 Words

accredited (adjective) /əˈkrɛd ɪ tɪd/
Definition: Having been officially recognized and certified as meeting specific standards or requirements set by an accrediting body or agency.
Example Sentence: "She is taking an online course from an accredited platform to boost her career prospects."
Synonyms: approved; attested; authorized; certified; confirmed; endorsed
Opposite Meaning: unauthorized

accumulate (verb) /əˈkjuːmjʊleɪt/
Definition: To gather or collect over time, usually in a slow and gradual manner.
Example Sentence: "He has been working hard to accumulate enough money to buy a new car."
Synonyms: accrue; acquire; amass; combine; compile; cumulate
Opposite Meaning: scatter

acknowledge (verb) /ækˈnɒl ɪdʒ/
Definition: To recognize, accept, or admit the existence, truth, importance, or validity of someone or something.
Example Sentence: "The company didn't acknowledge my email, so I am unsure if it was received."
Synonyms: accept; admit; affirm; avow; concede; confess
Opposite Meaning: deny

airborne (adjective) /ˈɛərˌbɔrn/
Definition: In the air or capable of traveling through the air.
Example Sentence: "The pollen grains became airborne, spreading allergens throughout the park."
Synonyms: aerial; elevated; floating; flying; gliding; hovering
Opposite Meaning: grounded

aperture (noun) /ˈæpərʧər/
Definition: An opening, hole, or gap, especially one that allows the passage of light, sound, or other substances.
Example Sentence: "The photographer adjusted the aperture on the camera to capture more light."
Synonyms: crack; crevice; fissure; inlet; passage; perforation
Opposite Meaning: closure

appeal (verb) /əˈpiːl/
Definition: To make a formal or informal request for a particular decision or outcome, often in a persuasive manner.
Example Sentence: "The lawyer will appeal the court's decision on behalf of his client."
Synonyms: beg; beseech; call; entreat; implore; invoke
Opposite Meaning: ignore

argument (noun) /ˈɑr gyə mənt/
Definition: A verbal or written exchange of ideas or opinions between individuals or groups with the aim of presenting and defending different viewpoints.
Example Sentence: "The couple engaged in a heated argument over household chores."
Synonyms: altercation; clash; conflict; confrontation; contention; debate
Opposite Meaning: agreement

atrophy (noun) /ˈæ trə fi/
Definition: The gradual decline or wasting away of a body part, tissue, or organ due to a lack of use, injury, or disease.
Example Sentence: "Prolonged bed rest can lead to muscle atrophy and loss of strength."
Synonyms: decay; decline; degeneration; deterioration; diminution; emaciation
Opposite Meaning: growth

background (noun) /ˈbækˌgraʊnd/
Definition: The environment, circumstances, or conditions against which something or someone exists or operates.
Example Sentence: "He has an impressive academic background with multiple degrees in engineering."
Synonyms: atmosphere; backdrop; circumstances; context; environment; heritage
Opposite Meaning: foreground

cardinal (adjective) /ˈkɑːd(ɪ)n(ə)l/
Definition: Of primary or fundamental importance, often serving as a key element or a central aspect of a particular situation, concept, or principle.
Example Sentence: "The cardinal rule of the organization was never to compromise on quality."
Synonyms: central; chief; crucial; essential; first; fundamental
Opposite Meaning: minor

choreography (noun) /ˌkɒrɪˈɒɡrəfi/
Definition: The art of creating and arranging dance movements and patterns.
Example Sentence: "Choreography can be created for stage performances, music videos, and films."
Synonyms: arrangement; composition; coordination; dance; design; direction
Opposite Meaning: stillness

compact (adjective) /kəmˈpækt/
Definition: Small in size or taking up minimal space.
Example Sentence: "The compact design of the new smartphone allowed for easy one-handed use."
Synonyms: bijou; compressed; concise; condensed; efficient; miniature
Opposite Meaning: bulky

controversy (noun) /ˈkɒn trəˌvɜr si/
Definition: A state or condition of disagreement, debate, or conflict arising from differing opinions, beliefs, or perspectives on a particular matter.
Example Sentence: "The politician's remarks sparked a heated controversy among voters."
Synonyms: altercation; argument; clash; conflict; contention; debate
Opposite Meaning: agreement

coordinate (verb) /kəʊˈɔːdnɪt/
Definition: To organize, harmonize, or align various elements, activities, or individuals to work together in a synchronized or cooperative manner towards a common goal or objective.
Example Sentence: "The dancers coordinate their movements gracefully to create a stunning performance."
Synonyms: align; arrange; collaborate; combine; facilitate; harmonize
Opposite Meaning: disorganize

corroborate (verb) /kəˈrɒbəreɪt/
Definition: To confirm or support something with additional evidence or information.
Example Sentence: "Testimonies from several people corroborate the events of that night."
Synonyms: affirm; authenticate; bolster; confirm; document; endorse
Opposite Meaning: contradict

denote (verb) /dɪˈnəʊt/
Definition: To indicate, signify or represent something, usually through a word, phrase or symbol.
Example Sentence: "In literature, spring often will denote new beginnings and renewal."
Synonyms: connote; designate; equal; express; imply; mark
Opposite Meaning: misrepresent

didactic (adjective) /dʌɪˈdaktɪk/
Definition: A tendency to teach or instruct, often in a formal or systematic way.
Example Sentence: "The teacher's didactic approach to teaching made the lesson boring and unengaging."
Synonyms: doctrinal; edifying; educational; enlightening; informative; instructive
Opposite Meaning: misleading

digestible (adjective) /daɪdʒestɪbəl/
Definition: Easily broken down, absorbed, or understood.
Example Sentence: "The online course offers digestible video lessons that make learning a new skill effortless."
Synonyms: absorbable; assimilable; coherent; comprehensible; edible; graspable
Opposite Meaning: indigestible

disagreement (noun) /ˌdɪs əˈgri mənt/
Definition: A state or instance of conflicting opinions, views, or positions between individuals or groups.
Example Sentence: "Their disagreement on the matter led to a temporary strain in their relationship."
Synonyms: argument; conflict; contention; difference; discord; dispute
Opposite Meaning: agreement

discern (verb) /dɪˈsɜrn/
Definition: To perceive, recognize, or distinguish something with clarity, often through the use of one's senses, intellect, or intuition.
Example Sentence: "His trained ear could discern the different musical instruments in the symphony."
Synonyms: apperceive; apprehend; ascertain; comprehend; detect; distinguish
Opposite Meaning: overlook

duplicate (noun) /ˈdjuːplɪkət/
Definition: An identical or nearly identical copy or replica of something, such as a document, object, image, or record.
Example Sentence: "The duplicate key didn't work in the lock."
Synonyms: equivalent; facsimile; identical; indistinguishable; matching; reproduction
Opposite Meaning: original

duty (noun) /ˈdu ti/
Definition: A moral or legal obligation, responsibility, or task that one is expected or required to fulfill.
Example Sentence: "The police officer diligently carried out his duty to protect and serve the community."
Synonyms: assignment; chore; commitment; function; job; labor
Opposite Meaning: choice

dynamic (adjective) /daɪˈnæm ɪk/
Definition: Characterized by constant change, activity, or progress.
Example Sentence: "The dynamic leader inspired his team with a clear vision and a passion for achieving collective goals."
Synonyms: active; animated; bustling; energetic; kinetic; lively
Opposite Meaning: static

electron (noun) /ɪˈlɛk trɒn/
Definition: A fundamental particle of matter and one of the key building blocks of atoms.
Example Sentence: "Electrons play a crucial role in the generation and transmission of electricity."
Synonyms: charge; current; energy; fundamental; magnetism; negatron
Opposite Meaning: proton

energy (noun) /ˈɛn ər dʒi/
Definition: Vitality, vigor, and the ability to sustain activity or exertion.
Example Sentence: "The dancer's performance was filled with grace and energy."
Synonyms: dynamism; enthusiasm; force; liveliness; power; spirit
Opposite Meaning: lethargy

equate (verb) /ɪˈkweɪt/
Definition: To make a comparison between two or more things, usually with the intention of suggesting that they are equal, similar, or equivalent in some way.
Example Sentence: "We should not equate intelligence with academic success."
Synonyms: associate; compare; connect; correlate; liken; match
Opposite Meaning: contrast

equitable (adjective) /ˈɛkwɪtəbl/
Definition: Pertaining to a sense of fairness, justice, and impartiality in the distribution of resources, opportunities, or benefits.
Example Sentence: "The organization's mission is to promote equitable access to education."
Synonyms: egalitarian; equal; ethical; evenhanded; fair; honest
Opposite Meaning: unfair

exceptional (adjective) /ɪkˈsɛp ʃə nl/
Definition: Standing out from the norm or surpassing average expectations in terms of quality, ability, or characteristics.
Example Sentence: "The athlete's exceptional performance earned her a gold medal at the Olympics."
Synonyms: extraordinary; incomparable; outstanding; phenomenal; prodigious; rare
Opposite Meaning: ordinary

exponential (adjective) /ˌɛkspə(ʊ)ˈnɛnʃl/
Definition: Describing a rapid and significant increase or growth that occurs at an accelerating rate over time.
Example Sentence: "The world's population has been growing at an exponential rate for centuries."
Synonyms: ascending; expanding; explosive; growing; mounting; rampant
Opposite Meaning: linear

foundational (adjective) /faʊnˈdeɪ ʃə nl/
Definition: Fundamental, essential, or serving as the basis for further development or understanding.
Example Sentence: "Strong reading skills are considered foundational for academic success."
Synonyms: basal; basic; core; elemental; essential; fundamental
Opposite Meaning: secondary

fragment (noun) /ˈfraɡm(ə)nt/
Definition: A small piece or section that has been broken off or separated from a larger whole.
"small fragments of pottery"
Example Sentence: "The vase shattered into a million fragments upon hitting the floor."
Synonyms: bit; chip; chunk; fraction; part; particle
Opposite Meaning: whole

genre (noun) /ˈʒɒnrə/
Definition: A category or type of artistic or literary work, characterized by a particular style, form, or subject matter.
Example Sentence: "The mystery genre is known for its intricate plots and suspenseful narratives."
Synonyms: bracket; class; classification; division; form; group
Opposite Meaning: mixture

glean (verb) /ɡlin/
Definition: To extract or gather information or knowledge from various sources, often by careful examination and research.
Example Sentence: "The investigator tried to glean some important details from the witness."
Synonyms: acquire; amass; collect; cull; derive; garner
Opposite Meaning: disregard

gradient (noun) /ˈɡreɪdɪənt/
Definition: The slope or incline of a landform, such as a hill or mountain.
Example Sentence: "The bike trail had a steady gradient, making it an easy ride."
Synonyms: acclivity; ascent; bank; camber; declivity; grade
Opposite Meaning: flatness

heuristic (adjective) /hjʊˈrɪstɪk/
Definition: Using practical and experimental methods to find a solution or to gain knowledge.
Example Sentence: "The heuristic approach enabled the students to discover the answer on their own."
Synonyms: analytical; empirical; experiential; exploratory; inquisitive; interrogative
Opposite Meaning: theoretical

hierarchy (noun) /ˈhʌɪərɑːki/
Definition: A system for which people or things are organized according to status or power.
Example Sentence: "The social hierarchy in the society was based on wealth and status."
Synonyms: chain; class; echelon; gradation; ladder; level
Opposite Meaning: equality

illustrate (verb) /ˈɪl əˌstreɪt/
Definition: To provide visual or verbal representation, clarification, or explanation of a concept, idea, or information.
Example Sentence: "The presentation was enhanced with visuals to illustrate the key points."
Synonyms: clarify; demonstrate; depict; display; elucidate; enlighten
Opposite Meaning: confuse

imagery (noun) /ˈɪm ɪdʒ ri/
Definition: The use of language or visual elements that create a mental image or evoke a sensory experience within the mind of the audience or reader.
Example Sentence: "The songwriter's lyrics were filled with beautiful imagery that resonated with listeners."
Synonyms: depictions; evocation; illustrations; pictures; portrayal; representation
Opposite Meaning: plainness

imply (verb) /ɪmˈplaɪ/
Definition: To indirectly suggest, hint at, or convey a meaning or message without explicitly stating it.
Example Sentence: "The politician's speech seemed to imply a change in policy without explicitly stating it."
Synonyms: allude; betoken; connote; convey; hint; indicate
Opposite Meaning: declare

inculcate (verb) /ˈɪnkʌlkeɪt/
Definition: To instil or teach something firmly in someone's mind, often through repetition or persistent instruction.
Example Sentence: "Teachers work to inculcate a love for learning in their students."
Synonyms: drill; engrain; foster; imbue; implant; impress
Opposite Meaning: neglect

indigenous (adjective) /ɪnˈdɪdʒɪnəs/
Definition: Native to a particular region or environment and have originated or developed there over a long period of time.
Example Sentence: "The indigenous people of the region have a long and rich cultural heritage."
Synonyms: aboriginal; autochthonous; domestic; homegrown; inherent; local
Opposite Meaning: foreign

indistinguishable (adjective) /ˌɪn dɪˈstɪŋ gwɪ ʃə bəl/
Definition: Unable to be distinguish or differentiate from something else.
Example Sentence: "The twins looked so similar that they were virtually indistinguishable from each other."
Synonyms: alike; duplicate; equal; homogeneous; identical; interchangeable
Opposite Meaning: distinguishable

irrefutable (adjective) /ˌɪrɪˈfjuːtəbl/
Definition: Absolutely indisputable, beyond any doubt or argument, and impossible to refute or contradict.
Example Sentence: "The detective gathered irrefutable evidence that led to the arrest of the culprit."
Synonyms: absolute; certain; clear; evident; incontestable; incontrovertible
Opposite Meaning: disputable

iteration (noun) /ˌɪtəˈreɪʃn/
Definition: The repetition of a process or the execution of a set of instructions a specified number of times or until a certain condition is met.
Example Sentence: "The latest iteration of the software includes several new features and enhancements."
Synonyms: duplication; recitation; reduplication; rehearsal; reiteration; renewal
Opposite Meaning: cessation

latitude (noun) /ˈlatɪtjuːd/
Definition: A geographic coordinate that indicates the north-south position of a point on the Earth's surface.
Example Sentence: "The equator is the reference line for measuring latitude."
Synonyms: breadth; compass; degree; location; meridian; parallel
Opposite Meaning: longitude

marine (adjective) /məˈrin/
Definition: Pertaining to or associated with the sea or ocean.
Example Sentence: "The marine biologist studied the behavior of dolphins in their natural habitat."
Synonyms: aquatic; briny; coastal; maritime; nautical; naval
Opposite Meaning: terrestrial

metabolize (verb) /məˈtæb əˌlaɪz/
Definition: To convert substances, such as food, drugs, or other chemicals, into different compounds through various biochemical reactions.
Example Sentence: "Our digestive system helps to metabolize food into nutrients."
Synonyms: absorb; assimilate; convert; degrade; digest; excrete
Opposite Meaning: reject

metacognition (noun) /ˌmɛt ə kɒgˈnɪʃ ən/
Definition: The awareness and understanding of one's own cognitive processes and the ability to reflect upon and regulate them.
Example Sentence: "Successful learners often utilize metacognition to monitor their understanding."
Synonyms: appraisal; awareness; cognizance; consciousness; evaluation; insight
Opposite Meaning: unawareness

methodical (adjective) /məˈθɒd ɪ kəl/
Definition: Characterized by a systematic and orderly method or procedure.
Example Sentence: "The scientist conducted the experiment in a methodical and precise manner."
Synonyms: careful; coordinated; disciplined; efficient; meticulous; planned
Opposite Meaning: haphazard

modern (adjective) /ˈmɒd ərn/
Definition: Pertaining to the present time or is characteristic of contemporary or current trends, styles, or ideas.
Example Sentence: "The modern kitchen features sleek stainless steel appliances."
Synonyms: advanced; contemporary; current; fresh; innovative; new
Opposite Meaning: outdated

montage (noun) /mɒnˈtɑʒ/
Definition: The technique or process of combining various images, sounds, or elements to create a unified and often expressive visual or auditory composition.
Example Sentence: "The film's opening credits included a stylish montage of cityscape shots."
Synonyms: amalgamation; arrangement; assemblage; collage; collection; combination
Opposite Meaning: singularity

neurology (noun) /njʊəˈrɒlədʒi/
Definition: The branch of medicine that deals with the diagnosis and treatment of disorders of the nervous system.
Example Sentence: "She pursued a career in neurology after witnessing her brother's battle with epilepsy."
Synonyms: brain; nerves; nervous; neurobiology; neurochemistry; neurodiagnostics
Opposite Meaning: disregard

notion (noun) /ˈnəʊʃn/
Definition: A general idea or belief about something, often based on limited evidence or understanding.
Example Sentence: "The notion of traveling to the moon was once considered impossible."
Synonyms: concept; judgment; opinion; perception; sentiment; suggestion
Opposite Meaning: certainty

outmoded (adjective) /ˌaʊtˈmoʊ dɪd/
Definition: No longer in fashion, style, or use due to being outdated, old-fashioned, or obsolete.
Example Sentence: "The outmoded phone booth stood as a relic of the pre-smartphone era."
Synonyms: ancient; antiquated; archaic; obsolete; outdated; passé
Opposite Meaning: modern

parallel (adjective) /ˈpær əˌlɛl/
Definition: Similar or comparable to each other, running or extending side by side in a consistent and equidistant manner without intersecting or crossing paths.
Example Sentence: "The parallel rows of trees created a beautiful symmetry in the garden."
Synonyms: aligned; analogous; coinciding; concurrent; corresponding; equidistant
Opposite Meaning: perpendicular

perception (noun) /pəˈsɛpʃn/
Definition: The process of understanding and interpreting sensory information.
Example Sentence: "Our perception of reality can be influenced by our beliefs and experiences."
Synonyms: apprehension; awareness; cognition; comprehension; conception; consciousness
Opposite Meaning: oblivion

preclude (verb) /prɪˈkluːd/
Definition: To prevent something from happening or someone from doing something.
Example Sentence: "Lack of funding may preclude us from pursuing the project further."
Synonyms: cease; evade; impede; inhibit; negate; neutralize
Opposite Meaning: allow

preponderance (noun) /priˈpɑndrəns/
Definition: The state or quality of being greater in number, quantity, or importance.
Example Sentence: "The preponderance of crime in the area raised concerns among local residents."
Synonyms: abundance; dominance; excess; extensiveness; majority; mass
Opposite Meaning: minority

protrude (verb) /proʊˈtrud/
Definition: To extend or stick out from a surface or area beyond what is normal or expected.
Example Sentence: "The tree roots protrude above the ground in the park."
Synonyms: bulge; emerge; extrude; jut; loom; obtrude
Opposite Meaning: recess

purport (verb) /pəˈpɔːt/
Definition: To claim or profess to be or do something, often with the implication that the claim may not be entirely truthful or accurate.
Example Sentence: "Why does he purport to be an expert when he has little experience?"
Synonyms: affirm; allege; argue; assert; avow; claim
Opposite Meaning: disclaim

rebuttal (noun) /rɪˈbʌtl/
Definition: The act of refuting or disproving an argument or claim that has been made by someone else.
Example Sentence: "He made a strong rebuttal to the opposing team's arguments."
Synonyms: confutation; contradiction; counterargument; counterclaim; counterstatement; defeat
Opposite Meaning: agreement

reduce (verb) /rɪˈdus/
Definition: To make something smaller, decrease in size, quantity, or intensity.
Example Sentence: "She decided to reduce her sugar intake for better health."
Synonyms: attenuate; compress; curtail; cut; decrease; diminish
Opposite Meaning: increase

relative (adjective) /ˈrɛl ə tɪv/
Definition: Denoting a connection or comparison between two or more things, highlighting their relationship or dependence on one another.
Example Sentence: "The difficulty of a task is relative to a person's skill level and experience."
Synonyms: affiliated; associated; comparative; connected; contextual; contingent
Opposite Meaning: unrelated

revolve (verb) /rɪˈvɒlv/
Definition: To move in a circular or orbital path around a central point or axis.
Example Sentence: "His life seems to revolve around his work, leaving little time for personal pursuits."
Synonyms: circle; gyrate; loop; orbit; oscillate; pivot
Opposite Meaning: stay

rigid (adjective) /ˈrɪdʒ ɪd/
Definition: Stiff, inflexible, or resistant to change or bending.
Example Sentence: "The rigid metal frame supported the weight of the heavy machinery."
Synonyms: firm; immovable; inflexible; solid; stiff; strict
Opposite Meaning: flexible

scrutinize (verb) /ˈskrut nˌaɪz/
Definition: To examine or inspect something closely and meticulously, often with great attention to detail.
Example Sentence: "The auditor will scrutinize the financial statements for any irregularities."
Synonyms: analyze; assess; audit; evaluate; examine; explore
Opposite Meaning: overlook

significant (adjective) /sɪgˈnɪf ɪ kənt/
Definition: Holding considerable importance, relevance, or influence.
Example Sentence: "The historical event had a significant impact on the course of world history."
Synonyms: considerable; crucial; important; meaningful; momentous; notable
Opposite Meaning: trivial

simultaneous (adjective) /ˌsɪmlˈteɪnɪəs/
Definition: Happening at the same time or in perfect synchronization, without any noticeable time lag or delay.
Example Sentence: "The dancers performed simultaneous movements in perfect synchronization."
Synonyms: coexisting; coincident; coinciding; concurrent; contemporaneous; parallel
Opposite Meaning: sequential

subjectivity (noun) /ˌsʌb dʒɛkˈtɪv ɪ ti/
Definition: The personal perspective or viewpoint influenced by individual feelings, beliefs, experiences, or opinions.
Example Sentence: "The subjectivity of art allows for diverse interpretations and emotional connections."
Synonyms: bias; feeling; impression; interpretation; opinion; outlook
Opposite Meaning: objectivity

suffix (noun) /ˈsʌfɪks/
Definition: A string of letters or sounds added to the end of a word to change its meaning or form a new word.
Example Sentence: "The suffix '-ly' was added to the verb to form an adverb."
Synonyms: addendum; addition; affix; appendage; appendix; attachment
Opposite Meaning: prefix

tacit (adjective) /ˈtasɪt/
Definition: Understood, implied, or conveyed without being explicitly expressed through words or formal agreement.
Example Sentence: "The lack of objections was a tacit agreement to proceed."
Synonyms: hinted; implicit; implied; indirect; inferred; inherent
Opposite Meaning: explicit

terminal (adjective) /ˈtəːmɪnl/
Definition: Final, irreversible, or situated at the end or ultimate stage of a process or condition.
Example Sentence: "The terminal prognosis was devastating news for the family."
Synonyms: concluding; deadly; fatal; incurable; inoperable; lethal
Opposite Meaning: initial

terrestrial (adjective) /tɪˈrɛstrɪəl/
Definition: Relating to anything that is associated with the Earth or the land as opposed to the sea or the sky.
Example Sentence: "Terrestrial ecosystems are essential for providing habitats for a variety of species."
Synonyms: earthbound; earthly; landlocked; mundane; physical; solid
Opposite Meaning: aquatic

traditional (adjective) /trəˈdɪʃ ə nl/
Definition: Rooted in or conforming to established customs, beliefs, practices, or methods that have been passed down through generations.
Example Sentence: "The traditional architecture of the old town reflected the rich history and cultural identity of the region."
Synonyms: ancestral; classic; conservative; conventional; customary; established
Opposite Meaning: modern

troposphere (noun) /ˈtrɒpəsfɪə/
Definition: The lowest layer of the Earth's atmosphere, extending from the surface up to an altitude of around 7 to 20 kilometers (4 to 12 miles).
Example Sentence: "The troposphere is where weather occurs and where most clouds are found."
Synonyms: air; atmosphere; climate; domain; environment; expanse
Opposite Meaning: stratosphere