irrevocable

Meanings

1. 1
   adj

   incapable of being retracted or revoked

   firm and irrevocable is my doom- Shakespeare

2. 2
   adj

   Unable to be retracted or reversed; final.

   Firm and irrevocable is my doom Which I have pass'd upon her; she is banish'd.

Etymology

From Middle French irrévocable, from Latin irrevocabilis; equivalent to ir- + revoke + -able.