behärska

Etymology
From. Cognate with 🇨🇬, 🇨🇬, 🇨🇬 and 🇨🇬. Equivalent to.

Verb

 * 1) to master, to command, to rule (over), to control (a territory, a situation, a language, a field of knowledge)
 * 2)  to restrain oneself, to control oneself