zapadać

Etymology
From.

Verb

 * 1)  to collapse
 * 2)  to fall, to descend, to immerse, to delve into
 * 3)  to become concave
 * 4)  to take refuge
 * 5)  to fall ill
 * 6)  to ensue, to come, to happen
 * 7)  to be borne in mind
 * 8)  to slide, to slump
 * 9)  to subside
 * 10)  to snow
 * 1)  to slide, to slump
 * 2)  to subside
 * 3)  to snow
 * 1)  to snow