adj. unbridled
adv. unbridledly
n. unbridledness
v. to release, unleash, make or become unbridled

Alduin always was pahlok - arrogant in his power. Uznahgar [sic] paar. He took domination as his birthright.
Uznahgar [sic] pahlok = unending ambition
(Paarthurnax, 0004591A)

Ahrk ond drey sahrot Heimverlund meyz, nol hevno Brom, med Strun do uznahgaar nahkriin nol Sovngarde nimaar.
And lo did the mighty Heimverlund come, from the brutal North, like a Storm of unbridled vengeance from Sovngarde itself.
(Word Wall for Strun, Storm Call)

Without control, restraint, or limit.

Likely from gaar ‘to release/unleash’. May also relate to nah ‘fury’. Similar in structure to unahzaal ‘unending’.

Misspelled as uznahgar in the dialogue, where it is possibly mistaken for unahzaal ‘unending’.