ir·revocable \(|)i, ə, (|)ir, (|)iə+\adjective Etymology: Middle English, from Latin irrevocabilis, from in- in- (I) + revocabilis revocable — more at revocable : incapable of being recalled or revoked : past recall : unalterable < an irrevocable promise > < firm and irrevocable is my doom — Shakespeare >