v. to vanquish; to eliminate; to deny, resist
n. vanquishment; elimination; denial, resistance

Sahrot thur qahnaraan!
The mighty overlord is vanquished!
(Dragon, 0009E075)

There are many hungers it is better to deny than to feed. … Discipline against the lesser aids in qahnaar... denial of the greater.
(Paarthurnax, 0003F9E2)

Nau daar revak golt drey Freda zahrahmiik ek Laas, ful tol ek pogaan kiir filok, ahrk osos sul qahnaar ek hokoron.
On this sacred ground did Freda sacrifice her Life, so that her many children might escape, and some day vanquish her enemies.
(Word Wall for Laas, Aura Whisper)

Primarily means ‘to defeat in battle’. Can also mean ‘to eliminate or resist’ a thought or desire, as though in a mental struggle.