English Antonyms for Irregular and Unpredictable Vocabulary Words – Online Quiz!

ambiguous (adjective) /amˈbɪɡjʊəs/
Definition: Open to multiple interpretations, unclear, or lacking a definite or precise meaning.
Antonyms quiz: Choose the opposite meaning of ambiguous.
Options: cryptic; equivocal; inconclusive; clear
Answer: clear
Example sentence: "The painting's abstract composition made its meaning highly ambiguous."

amiss (adjective) /əˈmɪs/
Definition: Not in its usual or expected state, suggesting that something is wrong or out of order.
Antonyms quiz: Choose the opposite meaning of amiss.
Options: erroneous; faulty; flawed; correct
Answer: correct
Example sentence: "The malfunctioning alarm system signaled that all was not amiss."

asynchronous (adjective) /eɪˈsɪŋkrənəs/
Definition: Not happening or progressing at the same time as something else.
Antonyms quiz: Choose the opposite meaning of asynchronous.
Options: desynchronized; disconnected; independent; simultaneous
Answer: simultaneous
Example sentence: "The software had an asynchronous feature, allowing for delayed data processing."

capricious (adjective) /kəˈprɪʃəs/
Definition: Unpredictable and subject to sudden changes of mood or behavior.
Antonyms quiz: Choose the opposite meaning of capricious.
Options: changeable; erratic; fickle; stable
Answer: stable
Example sentence: "The capricious stock market left investors feeling nervous."

chance (verb) /tʃæns/
Definition: To take a risk or engage in an activity with an uncertain outcome or result.
Antonyms quiz: Choose the opposite meaning of chance.
Options: dare; experiment; explore; avoid
Answer: avoid
Example sentence: "Let's chance a visit to that new café for lunch."

cryptic (adjective) /ˈkrɪptɪk/
Definition: Mysterious, puzzling, or intentionally difficult to understand or decipher.
Antonyms quiz: Choose the opposite meaning of cryptic.
Options: abstruse; arcane; coded; clear
Answer: clear
Example sentence: "The ancient hieroglyphs on the wall remained cryptic to archaeologists."

delusion (noun) /dɪˈl(j)uːʒn/
Definition: A false belief or idea that is not supported by any evidence or rational thinking.
Antonyms quiz: Choose the opposite meaning of delusion.
Options: fallacy; fantasy; hallucination; reality
Answer: reality
Example sentence: "Believing in a miracle cure can be a dangerous delusion."

elusive (adjective) /ɪˈl(j)uːsɪv/
Definition: Difficult to capture, grasp, or pin down, often due to its fleeting or evasive nature.
Antonyms quiz: Choose the opposite meaning of elusive.
Options: baffling; evasive; inaccessible; accessible
Answer: accessible
Example sentence: "Her dreams of fame remained elusive despite years of effort."

equivocal (adjective) /ɪˈkwɪvək(ə)l/
Definition: Unclear, ambiguous, and open to more than one interpretation.
Antonyms quiz: Choose the opposite meaning of equivocal.
Options: ambiguous; ambivalent; cryptic; clear
Answer: clear
Example sentence: "Her equivocal statement raised doubts about her commitment."

errant (adjective) /ˈɛrənt/
Definition: Deviating from the expected or intended course, often implying a sense of wandering, straying, or going astray.
Antonyms quiz: Choose the opposite meaning of errant.
Options: aberrant; erratic; misbehaving; direct
Answer: direct
Example sentence: "The errant driver swerved dangerously through traffic, causing chaos on the road."

erratic (adjective) /ɪˈratɪk/
Definition: Characterized by irregular, unpredictable, or inconsistent behavior, movements, or patterns.
Antonyms quiz: Choose the opposite meaning of erratic.
Options: capricious; fickle; fitful; consistent
Answer: consistent
Example sentence: "The employee's work performance was affected by her erratic attendance."

fluctuate (verb) /ˈflʌkʧəˌweɪt/
Definition: To change or vary in something, usually in a repetitive or irregular manner.
Antonyms quiz: Choose the opposite meaning of fluctuate.
Options: alternate; oscillate; seesaw; stabilize
Answer: stabilize
Example sentence: "Consumer demand for the product fluctuates depending on the season."

foreshadow (verb) /fɔrˈʃæd oʊ/
Definition: To hint or suggest future events, developments, or outcomes within a story or narrative.
Antonyms quiz: Choose the opposite meaning of foreshadow.
Options: augur; forecast; foretell; hide
Answer: hide
Example sentence: "The sudden chirping of the birds at dusk seemed to foreshadow a strange night."

foresight (noun) /ˈfɔrˌsaɪt/
Definition: The ability to anticipate or predict future events, needs, or consequences with careful planning and consideration.
Antonyms quiz: Choose the opposite meaning of foresight.
Options: anticipation; caution; discernment; shortsightedness
Answer: shortsightedness
Example sentence: "With great foresight, she saved money for future emergencies."

foretell (verb) /fɔrˈtɛl/
Definition: To predict or prophesize future events or outcomes.
Antonyms quiz: Choose the opposite meaning of foretell.
Options: anticipate; augur; divine; disregard
Answer: disregard
Example sentence: "Some people believe that dreams can foretell significant events in their lives."

hallucinate (verb) /həˈl(j)uːsɪneɪt/
Definition: To perceive something that is not actually present, typically in a sensory or perceptual manner.
Antonyms quiz: Choose the opposite meaning of hallucinate.
Options: delude; dream; envision; perceive
Answer: perceive
Example sentence: "It's not uncommon for patients with high fever to hallucinate."

hypothetical (adjective) /hʌɪpəˈθɛtɪk(ə)l/
Definition: Based on a supposition or assumption, rather than on an actual fact or reality.
Antonyms quiz: Choose the opposite meaning of hypothetical.
Options: assumed; conceptual; conjectural; actual
Answer: actual
Example sentence: "The scientist presented a hypothetical model to explain the observed phenomena."

indeterminate (adjective) /ˌɪndɪˈtəːmɪnət/
Definition: Uncertain, not fixed, or not capable of being determined.
Antonyms quiz: Choose the opposite meaning of indeterminate.
Options: imprecise; inconclusive; indefinite; definite
Answer: definite
Example sentence: "The cause of the fire is still indeterminate."

intermittent (adjective) /ˌɪntəˈmɪt(ə)nt/
Definition: Occurring at irregular intervals, pausing or ceasing temporarily before resuming.
Antonyms quiz: Choose the opposite meaning of intermittent.
Options: alternating; irregular; occasional; constant
Answer: constant
Example sentence: "The old car had intermittent engine trouble on long drives."

limbo (noun) /ˈlɪmbəʊ/
Definition: A state of uncertainty, ambiguity, or being in between two states or conditions.
Antonyms quiz: Choose the opposite meaning of limbo.
Options: abyss; confusion; nothingness; certainty
Answer: certainty
Example sentence: "Her application was in limbo, as the committee had yet to make a decision."

paradox (noun) /ˈparədɒks/
Definition: A statement or situation that seems to be contradictory or false, but upon closer examination, may actually be true or make sense.
Antonyms quiz: Choose the opposite meaning of paradox.
Options: ambiguity; anomaly; contradiction; clarity
Answer: clarity
Example sentence: "The grandfather paradox explores time travel's mind-bending implications."

precarious (adjective) /prɪˈkɛːrɪəs/
Definition: Unstable, uncertain, and at risk of collapsing or failing at any moment.
Antonyms quiz: Choose the opposite meaning of precarious.
Options: dangerous; dicey; dodgy; stable
Answer: stable
Example sentence: "The rickety bridge appeared precarious, but they had no other choice."

precipitous (adjective) /prɪˈsɪpɪtəs/
Definition: Extremely steep, sudden, or dramatic in its descent or progress.
Antonyms quiz: Choose the opposite meaning of precipitous.
Options: abrupt; dizzy; fast; gradual
Answer: gradual
Example sentence: "The company's precipitous decline in profits led to layoffs and restructuring."

ramification (noun) /ˌræmɪfɪˈkeɪʃᵊn/
Definition: The complex, often unforeseen consequences, outcomes, or branches that result from a particular action, decision, event, or situation.
Antonyms quiz: Choose the opposite meaning of ramification.
Options: aftermath; consequence; development; cause
Answer: cause
Example sentence: "Economic decisions often have far-reaching ramifications."

seldom (adverb) /ˈsɛldəm/
Definition: Occurring or happening rarely, infrequently, or with a low degree of regularity.
Antonyms quiz: Choose the opposite meaning of seldom.
Options: hardly; infrequently; never; frequently
Answer: frequently
Example sentence: "He seldom complains, even when facing challenging situations."

solstice (noun) /ˈsɒlstɪs/
Definition: An astronomical event that occurs twice a year, marking the longest and shortest days of the year.
Antonyms quiz: Choose the opposite meaning of solstice.
Options: acme; apex; climax; everyday
Answer: everyday
Example sentence: "The solstice happens when the Earth's axis is tilted towards or away from the sun."

sporadic (adjective) /spəˈradɪk/
Definition: Occurring irregularly, infrequently, and without a consistent pattern or schedule.
Antonyms quiz: Choose the opposite meaning of sporadic.
Options: episodic; fitful; haphazard; regular
Answer: regular
Example sentence: "Sporadic applause followed his uninspiring speech."

surge (noun) /sɜrʤ/
Definition: A sudden, powerful increase in something, such as a rapid rise in volume, intensity, or activity.
Antonyms quiz: Choose the opposite meaning of surge.
Options: burst; escalation; flurry; decline
Answer: decline
Example sentence: "The sudden surge of energy made him feel invincible."

suspend (verb) /səˈspɛnd/
Definition: To temporarily halt, pause, or discontinue something.
Antonyms quiz: Choose the opposite meaning of suspend.
Options: cease; defer; delay; continue
Answer: continue
Example sentence: "The school might suspend him for his disruptive behavior."

suspension (noun) /səˈspɛn ʃən/
Definition: The act or state of temporarily stopping, delaying, or putting on hold something that was previously in motion or progress.
Antonyms quiz: Choose the opposite meaning of suspension.
Options: break; cessation; delay; continuation
Answer: continuation
Example sentence: "Nanoparticles in suspension can be used for advanced medical treatments."

tangent (noun) /ˈtan(d)ʒ(ə)nt/
Definition: A completely different line of thought or action that is not related to the current topic or situation.
Antonyms quiz: Choose the opposite meaning of tangent.
Options: aside; departure; detour; relevance
Answer: relevance
Example sentence: "The physics lecture took an unexpected tangent into the realm of quantum mechanics."

tangential (adjective) /tanˈdʒɛn(t)ʃl/
Definition: Loosely or slightly connected to the main topic, idea, or conversation.
Antonyms quiz: Choose the opposite meaning of tangential.
Options: collateral; digressive; divergent; central
Answer: central
Example sentence: "He tends to go off on tangential topics when he's excited about a subject."

tenuous (adjective) /ˈtɛnjʊəs/
Definition: Thin, fragile, or having a weak or delicate connection, often implying that it is easily breakable or unstable.
Antonyms quiz: Choose the opposite meaning of tenuous.
Options: doubtful; dubious; flimsy; strong
Answer: strong
Example sentence: "The company's financial situation was tenuous due to the pandemic."

tergiversation (noun) /ˌtɜːʤɪvɜːˈseɪʃᵊn/
Definition: To evasively or dishonestly change one's stance, opinion, or allegiance on a particular issue.
Antonyms quiz: Choose the opposite meaning of tergiversation.
Options: deceit; deceitfulness; deception; consistency
Answer: consistency
Example sentence: "Her tergiversation in the courtroom undermined her credibility as a witness."

threatening (adjective) /ˈθrɛt n ɪŋ/
Definition: Causing a sense of danger, harm, or intimidation.
Antonyms quiz: Choose the opposite meaning of threatening.
Options: aggressive; alarming; dangerous; welcoming
Answer: welcoming
Example sentence: "His menacing stare and clenched fists made his intentions clear - he was threatening violence."

trap (noun) /træp/
Definition: A device or mechanism designed to capture, restrain, or deceive something or someone.
Antonyms quiz: Choose the opposite meaning of trap.
Options: ambush; decoy; device; liberate
Answer: liberate
Example sentence: "The mouse cautiously approached the cheese, unaware of the trap awaiting it."

unplanned (adjective) /ʌnˈplænd/
Definition: Without prior intention, forethought, or preparation.
Antonyms quiz: Choose the opposite meaning of unplanned.
Options: ad-hoc; extemporaneous; haphazard; planned
Answer: planned
Example sentence: "Due to an unplanned power outage, the meeting had to be rescheduled."

unwittingly (adverb) /ʌnˈwɪtɪŋli/
Definition: Carried out without conscious awareness, knowledge, or intention.
Antonyms quiz: Choose the opposite meaning of unwittingly.
Options: accidentally; carelessly; heedlessly; intentionally
Answer: intentionally
Example sentence: "The teacher unwittingly gave away the answer during his explanation."

vagary (noun) /ˈveɪɡ(ə)ri/
Definition: An unpredictable or unusual change in behavior, mood, or action.
Antonyms quiz: Choose the opposite meaning of vagary.
Options: anomaly; caprice; deviation; predictability
Answer: predictability
Example sentence: "His creative vagary led him to explore art forms he had never considered before."

wager (noun) /ˈweɪdʒə/
Definition: A bet or a stake that is placed on the outcome of a particular event or situation.
Antonyms quiz: Choose the opposite meaning of wager.
Options: bet; chance; flutter; certainty
Answer: certainty
Example sentence: "The wager was settled with a friendly game of poker."

wayward (adjective) /ˈweɪwəd/
Definition: Difficult to control or predict, often because of a lack of discipline or direction.
Antonyms quiz: Choose the opposite meaning of wayward.
Options: capricious; contrary; defiant; compliant
Answer: compliant
Example sentence: "The wayward arrow missed the target, getting lost in the trees."