krotiti

1. (of animals) to tame
   On već dvadeset godina kroti lavove u cirkusu. — He has been taming lions in the circus for twenty years.
2. (of feelings, temper) to curb; to restrain
   Teško kroti svoj temperament kad se naljuti. — He finds it hard to curb his temper when he gets angry.

The perfective is ukrotiti.