资料来源 : pyDict

不能挽回的,不能取消的,不能变更的

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Irrevocable \Ir*rev"o*ca*ble\, a. [L. irrevocabilis: cf. F.
   irr['e]vocable. 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.

资料来源 : WordNet®

irrevocable
     adj : impossible to retract or revoke; "firm and irrevocable is my
           doom"- Shakespeare [syn: {irrevokable}] [ant: {revocable}]