adj. unending, ceaseless, eternal
adv. ceaselessly, eternally
n. ceaselessness, eternalness
v. to eternalize, immortalize

Het nok kopraan do Hela, Fahdon wah pah sivaas aar do Kaan. Aal rek siiv unahzaal praan ko Feykro do Hahnu.
Here lies the body of Hela, friend to all beasts and servant of Kyne. May she find eternal rest in the Forest of Dreams.
(Word Wall for Kaan, Kyne’s Peace)

Much less common than synonym unslaad ‘unending’.

Possibly derives from an unattested word zaal meaning ‘to end or cease’ seen also in Keizaal ‘Skyrim’. Likely shares negative prefix un- with unslaad ‘unending’.