The Collaborative International Dictionary
Irrevocableness
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.
Wiktionary
irrevocableness
n. Quality of being irrevocable.
Usage examples of "irrevocableness".
It was now as it had been eight months ago--Adam was forcing Arthur to feel more intensely the irrevocableness of his own wrong-doing.
They had served for some time now under his Magnificence, knew his obstinacy and the irrevocableness of his decisions when once he had spoken.