pogrążać

Etymology
From.

Verb

 * 1)  to immerse, to submerge
 * 2)  to plunge
 * 3)  to sink, to go under
 * 4)  to worsen, to deteriorate, to slide
 * 5)  to be lost, to be preoccupied
 * 1)  to be lost, to be preoccupied