tężeć

Etymology
From.

Verb

 * 1)  to coagulate, to congeal, to solidify, to set, to gel
 * 2)  to freeze, to stiffen, to become motionless
 * 3)  to build up, to intensify
 * 1)  to build up, to intensify
 * 1)  to build up, to intensify