Ir‐rev″o‐ca‐ble (?), a. [L. irrevocabilis: cf. F. irrévocable. See In- not, and Revoke, and cf. Irrevocable.] Incapable of being recalled or revoked; unchangeable; irreversible; unalterable; as, an irrevocable promise or decree; irrevocable fate.
Firm and irrevocable is my doom. Shak.
— Ir‐rev″o‐ca‐ble‐ness, n. — Ir‐rev″o‐ca‐bly, adv.