iskaljivati

1. (na + loc.) to take it out on; to vent
   Stalno iskaljuje bes na deci kad dođe s posla. — He's always taking his anger out on the kids when he gets home from work.
   Nemoj da se iskaljuješ na meni, nisam ja kriv. — Don't take it out on me, it's not my fault.

Used as iskaljivati bes/ljutnju na kome or iskaljivati se na kome. For hardening metal, modern Serbian usually uses kaliti (kovač kali čelik).