պակնում

Etymology
The root is and is the same with the root  of.

Verb

 * 1)  to be frightened, appalled, terrified, dismayed, palsied or stupefied with fear, to be struck with terror; to feel giddy, dizzy or stupefied with fear
 * 2)  to shudder, to tremble
 * 3)  to be amazed, surprised, petrified with astonishment