irreducible
— Adjective
– English
~ incapable of being made smaller or simpler; "an irreducible minimum"; "an irreducible formula"; "an irreducible hernia"
irrefutable
— Adjective
– English
~ impossible to deny or disprove; "incontrovertible proof of the defendant's innocence"; "proof positive"; "an irrefutable argument"
irregardless
— Adverb
– English
~ regardless; a combination of irrespective and regardless sometimes used humorously
irregular
— Noun
– English
~ a member of an irregular armed force that fights a stronger force by sabotage and harassment
irregular
— Noun
– English
~ merchandise that has imperfections; usually sold at a reduced price without the brand name
irregular
— Adjective
– English
~ (used of the military) not belonging to or engaged in by regular army forces; "irregular troops"; "irregular warfare"