Irreversible1. (a.) Incapable of being turned back; irrevocable; incapable of being made to run backward; as, an irreversible engine.
2. (a.) Incapable of being reversed, recalled, repealed, or annulled; as, an irreversible sentence or decree.
Thesaurus Entries
beyond recall, beyond remedy, changeless, chronic, confirmed, constant, cureless, deep-dyed, deep-fixed, deep-rooted, deep-seated, deep-set, deep-settled, direct, dyed-in-the-wool, established, fast, final, fixed, gone, immediate, immedicable, immutable, implanted, incommutable, inconvertible, incorrigible, inculcated, incurable, indefeasible, inert, infixed, ingrained, inoperable, instilled, insusceptible of change, intransmutable, invariable, inveterate, irreclaimable, irrecoverable, irredeemable, irreformable, irremediable, irreparable, irretrievable, irrevocable, lasting, long-established, lost, noble, nonreturnable, nonreversible, one-way, past hope, past praying for, permanent, remediless, reverseless, rooted, ruined, set, settled, settled in habit, straight, straightaway, straightforward, straightway, terminal, thorough, unalterable, unalterative, unaltered, unbroken, unchangeable, unchanged, unchanging, undeflectable, undeviating, undone, unidirectional, uninterrupted, unmitigable, unmodifiable, unrelievable, unremitting, unrestorable, unreturnable, unsalvable, unsalvageable, unsusceptible, unswerving, unvariable, unvarying