English Antonyms for Prefix ir- Vocabulary Words – Online Quiz!

irascible (adjective) /ɪˈrasɪb(ə)l/
Definition: Having a tendency to become easily angered, irritated, or provoked.
Antonyms quiz: Choose the opposite meaning of irascible.
Options: captious; crabby; fractious; easy-going
Answer: easy-going
Example sentence: "Her colleagues learned to tread carefully around her irascible moods."

irate (adjective) /ʌɪˈreɪt/
Definition: Extremely angry, furious, or incensed due to a perceived wrong, injustice, or frustration.
Antonyms quiz: Choose the opposite meaning of irate.
Options: agitated; angry; enraged; calm
Answer: calm
Example sentence: "Sarah was irate when she found out her favorite dress was ruined by the laundry service."

iridescent (adjective) /ˌɪrəˈdɛsənt/
Definition: Displaying a play of lustrous, rainbow-like colors that change as the angle of observation changes.
Antonyms quiz: Choose the opposite meaning of iridescent.
Options: colorful; multicolored; nacreous; monochrome
Answer: monochrome
Example sentence: "She wore a dress adorned with iridescent sequins that caught everyone's attention."

irk (verb) /ɜrk/
Definition: To be annoyed, irritated, or bothered by someone or something.
Antonyms quiz: Choose the opposite meaning of irk.
Options: agitate; annoy; bother; please
Answer: please
Example sentence: "The repetitive commercials on TV irk many viewers."

irksome (adjective) /ˈəːks(ə)m/
Definition: Annoying, tedious, or bothersome in nature, causing irritation or frustration.
Antonyms quiz: Choose the opposite meaning of irksome.
Options: aggravating; annoying; bothersome; pleasant
Answer: pleasant
Example sentence: "The summer heat became irksome, making everyone uncomfortable."

ironic (adjective) /aɪˈrɒn ɪk/
Definition: Displaying a sharp contrast between what is expected or intended and what actually occurs.
Antonyms quiz: Choose the opposite meaning of ironic.
Options: humorous; incongruous; paradoxical; straightforward
Answer: straightforward
Example sentence: "The weather forecast predicted a sunny day for the picnic, but it ended up raining – quite ironic."

irony (noun) /ˈaɪ rə ni/
Definition: A stark contrast between what is expected or intended and what actually occurs, often leading to a sense of incongruity or amusement.
Antonyms quiz: Choose the opposite meaning of irony.
Options: absurdity; contradiction; cynicism; straightforwardness
Answer: straightforwardness
Example sentence: "In a twist of irony, the health-conscious marathon runner slipped on a banana peel and ended up in the hospital."

irrational (adjective) /ɪræʃənəl/
Definition: Lacking reason, logic, or sound judgment.
Antonyms quiz: Choose the opposite meaning of irrational.
Options: absurd; crazy; delusional; rational
Answer: rational
Example sentence: "The company's decision to lay off experienced employees and retain less qualified ones seemed irrational from a business perspective."

irreconcilable (adjective) /ɪˈrɛkənsaɪləbᵊl/
Definition: Incapable of being resolved or brought into agreement.
Antonyms quiz: Choose the opposite meaning of irreconcilable.
Options: antagonistic; clashing; conflicting; harmonious
Answer: harmonious
Example sentence: "His sense of duty and his desire for freedom seemed irreconcilable."

irrecoverable (adjective) /ˌɪr ɪˈkʌv ər ə bəl/
Definition: Cannot be recovered, regained, or retrieved.
Antonyms quiz: Choose the opposite meaning of irrecoverable.
Options: gone; irredeemable; irreparable; retrievable
Answer: retrievable
Example sentence: "The ancient manuscript, once ruined by water, became an irrecoverable treasure."

irreducible (adjective) /ˌɪrɪˈdjuːsɪbl/
Definition: Cannot be reduced, simplified, or made smaller in size or complexity.
Antonyms quiz: Choose the opposite meaning of irreducible.
Options: essential; immutable; inalienable; reducible
Answer: reducible
Example sentence: "There's an irreducible charm about that old village."

irrefutable (adjective) /ˌɪrɪˈfjuːtəbl/
Definition: Absolutely indisputable, beyond any doubt or argument, and impossible to refute or contradict.
Antonyms quiz: Choose the opposite meaning of irrefutable.
Options: absolute; certain; clear; disputable
Answer: disputable
Example sentence: "His confession and the eyewitness testimony made the case against him irrefutable."

irregular (adjective) /ɪregjʊləʳ/
Definition: Deviating from the standard or usual pattern, form, or arrangement.
Antonyms quiz: Choose the opposite meaning of irregular.
Options: abnormal; asymmetrical; atypical; regular
Answer: regular
Example sentence: "He found an irregular stone that looked as if it could be an ancient artifact."

irregularity (noun) /ɪˌrɛg yəˈlær ɪ ti/
Definition: The state or quality of deviating from the usual or expected pattern, form, or behavior.
Antonyms quiz: Choose the opposite meaning of irregularity.
Options: aberration; anomaly; defect; conformity
Answer: conformity
Example sentence: "The athlete was disqualified due to an irregularity in their drug test results."

irrelevant (adjective) /ɪˈrɛl ə vənt/
Definition: Not connected, applicable, or pertinent to the matter at hand.
Antonyms quiz: Choose the opposite meaning of irrelevant.
Options: extraneous; immaterial; inapplicable; pertinent
Answer: pertinent
Example sentence: "The outdated research findings were deemed irrelevant in the context of the current study."

irreparable (adjective) /ɪˈrɛp ər ə bəl/
Definition: Cannot be repaired, restored, or rectified.
Antonyms quiz: Choose the opposite meaning of irreparable.
Options: incurable; irrecoverable; irredeemable; fixable
Answer: fixable
Example sentence: "The financial crisis has had an irreparable impact on many small businesses."

irreproachable (adjective) /ɪrɪˈprəʊtʃəb(ə)l/
Definition: Faultless, blameless, or beyond criticism or reproach.
Antonyms quiz: Choose the opposite meaning of irreproachable.
Options: exceptional; exemplary; faultless; blameworthy
Answer: blameworthy
Example sentence: "The chef's culinary skills were considered irreproachable by food critics."

irresistible (adjective) /ˌɪrɪˈzɪstɪbl/
Definition: So captivating, appealing, or enticing that it is impossible to resist or refuse.
Antonyms quiz: Choose the opposite meaning of irresistible.
Options: alluring; compelling; compulsive; resistible
Answer: resistible
Example sentence: "The irresistible temptation of the chocolate cake was too hard to resist."

irresolute (adjective) /ɪˈrɛz əˌlut/
Definition: Lacking firmness, determination, or the ability to make decisive choices.
Antonyms quiz: Choose the opposite meaning of irresolute.
Options: ambivalent; dithering; doubtful; determined
Answer: determined
Example sentence: "The team's irresolute leader hindered progress on the project."

irresponsible (adjective) /ˌɪr ɪˈspɒn sə bəl/
Definition: Lacking a sense of duty, accountability, or consideration for the consequences of one's actions.
Antonyms quiz: Choose the opposite meaning of irresponsible.
Options: careless; heedless; immature; responsible
Answer: responsible
Example sentence: "Being late for work every day shows an irresponsible attitude towards professional commitments."

irreverent (adjective) /ɪˈrɛvərənt/
Definition: Showing a lack of respect or reverence towards something that is typically held in high regard.
Antonyms quiz: Choose the opposite meaning of irreverent.
Options: audacious; blasphemous; cheeky; respectful
Answer: respectful
Example sentence: "Her irreverent remarks about the teacher landed her in detention."

irrevocable (adjective) /ɪˈrɛvəkəbəl/
Definition: Cannot be changed or undone
Antonyms quiz: Choose the opposite meaning of irrevocable.
Options: changeless; enduring; final; reversible
Answer: reversible
Example sentence: "Signing the contract meant accepting the irrevocable terms and conditions."

irrigation (noun) /ˌɪrɪˈɡeiʃən/
Definition: The practice or system of supplying water to land areas that require additional moisture for agricultural purposes, plant growth, or landscaping.
Antonyms quiz: Choose the opposite meaning of irrigation.
Options: dampening; dousing; drenching; dehydration
Answer: dehydration
Example sentence: "The agricultural region thrived thanks to its advanced irrigation practices."

irritate (verb) /ˈɪr ɪˌteɪt/
Definition: To cause annoyance, frustration, or provocation in someone or something.
Antonyms quiz: Choose the opposite meaning of irritate.
Options: agitate; annoy; bother; soothe
Answer: soothe
Example sentence: "It irritates me when people talk loudly in the library."

irritating (adjective) /ˈɪr ɪˌteɪ tɪŋ/
Definition: Causing annoyance, frustration, or agitation.
Antonyms quiz: Choose the opposite meaning of irritating.
Options: agitating; annoying; bothersome; pleasing
Answer: pleasing
Example sentence: "The slow and unreliable internet connection was incredibly irritating, causing delays and frustrations."

irritation (noun) /ˌɪrɪˈteɪʃᵊn/
Definition: A state of annoyance, frustration, or displeasure caused by something that provokes impatience, agitation, or discomfort.
Antonyms quiz: Choose the opposite meaning of irritation.
Options: agitation; annoyance; bother; pleasure
Answer: pleasure
Example sentence: "The repetitive noise of the construction work outside was a constant source of irritation."