irreprehensible (adj.) irreplaceable (adj.) irreparably (adv.) irreparable (adj.) irremovable (adj.) irremediably (adv.) irremediable (adj.) irreligious (adj.) irreligion (n.) irrelevant (adj.) irrelevance (n.) irregularity (n.) irregular (adj.) irregardless (adj.) irrefutable (adj.) irrefrangible (adj.) irrefragable (adj.) irreducible (adj.) irredeemable (adj.) irrecoverable (adj.)