sprawdzać

Etymology
From.

Verb

 * 1)  to check, to check up
 * 2)  to verify
 * 3)  to check oneself
 * 4)  to check each other
 * 5)  to realize, to actualize, to materialize
 * 6)  to prove onself, to work out, to turn out to be handy or useful
 * 1)  to prove onself, to work out, to turn out to be handy or useful