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— ir·re·duc·ibly adverb

ir·re·fut·able adjective : impossible to refute

Synonyms

incontestable, indisputable, indubitable, unanswerable, undeniable, unquestionable; also certain, definite, positive, sure; unambiguous, unequivocal; absolute, clear, conclusive, decisive; uncontested, undisputed

Antonyms

answerable, debatable, disputable, questionable

irreg abbreviation irregular

ir·reg·u·lar adjective 1 : not regular : not natural or uniform

2 : not conforming to the normal or usual manner of inflection <~ verbs>

3 : not belonging to a regular or organized army <~ troops>

— irregular noun

— ir·reg·u·lar·ly adverb

Synonyms

aberrant, abnormal, anomalous, atypical, deviant, unnatural—more at DEVIANT

informal, unceremonious, unconventional, unorthodox—more at INFORMAL

ir·reg·u·lar·i·ty noun, plural -ties 1 : something that is irregular

2 : the quality or state of being irregular

3 : occasional constipation

ir·rel·e·vant adjective : not relevant

— ir·rel·e·vance noun

Synonyms

extraneous, immaterial; also inconsequential, insignificant, unimportant; meaningless, pointless, senseless, useless; inappropriate, inapt, unsuitable

ir·re·li·gious adjective : lacking religious emotions, doctrines, or practices

Synonyms

blasphemous, nonreligious, sacrilegious

Antonyms

religious

ir·re·me·di·a·ble adjective : impossible to remedy or correct

Synonyms

hopeless, incorrigible, incurable, irredeemable, unrecoverable, unredeemable—more at HOPELESS

ir·re·mov·able adjective : not removable

ir·rep·a·ra·ble adjective : impossible to make good, undo, repair, or remedy <~ damage>

Synonyms

irredeemable, irremediable, unrecoverable, unredeemable; also irreplaceable, irrevocable

Antonyms

redeemable, remediable, retrievable

ir·re·place·able adjective : not replaceable

ir·re·press·ible adjective : impossible to repress or control

ir·re·proach·able adjective : not reproachable

Synonyms

blameless, clear, faultless, guiltless, impeccable, innocent, irreproachable—more at INNOCENT

ir·re·sist·ible adjective : impossible to successfully resist

— ir·re·sist·ibly adverb

ir·res·o·lute adjective : uncertain how to act or proceed : VACILLATING

— ir·res·o·lute·ly adverb

ir·res·o·lu·tion noun : lack of resolution : a fluctuation of mind (as in doubt or between hope and fear)

Synonyms

hesitancy, hesitation, indecision, vacillation—more at HESITATION

ir·re·spec·tive of preposition : without regard to

ir·re·spon·si·ble adjective : not responsible

— ir·re·spon·si·bil·i·ty noun

— ir·re·spon·si·bly adverb

Synonyms

foolhardy, reckless—more at RECKLESS

ir·re·triev·able adjective : not retrievable : IRRECOVERABLE

ir·rev·er·ence noun 1 : lack of reverence

2 : an irreverent act or utterance

Synonyms

blasphemy, defilement, desecration, impiety, sacrilege—more at BLASPHEMY

ir·rev·er·ent adjective : lacking proper respect or seriousness; also : SATIRIC

— ir·rev·er·ent·ly adverb

ir·re·vers·ible adjective : incapable of being reversed

ir·rev·o·ca·ble adjective : incapable of being revoked or recalled

— ir·rev·o·ca·bly adverb

ir·ri·gate verb -gat·ed; -gat·ing : to supply (as land) with water by artificial means; also : to flush with liquid

— ir·ri·ga·tion noun

Synonyms

flush, rinse, sluice, wash—more at FLUSH

ir·ri·ta·bil·i·ty noun 1 : the property of living things and of protoplasm that enables reaction to stimuli

2 : the quality or state of being irritable; especially : readiness to become annoyed or angry

Synonyms

grumpiness, peevishness

ir·ri·ta·ble adjective : capable of being irritated; especially : readily or easily irritated

— ir·ri·ta·bly adverb

Synonyms

choleric, crabby, cranky, cross, crotchety, grouchy, grumpy, irascible, peevish, perverse, petulant, short-tempered, snappish, snappy, snippy, testy, waspish; also bearish, bilious, cantankerous, disagreeable, dyspeptic, ill-humored, ill-natured, ill-tempered, ornery, surly; sensitive, sulky, thin-skinned, touchy;