crkavati

1. (of animals) to die; to perish
   Ribe u jezeru crkavaju zbog zagađenja. — The fish in the lake are dying because of the pollution.
2. colloq. (+ od something) to be dying of something
   Crkavam od dosade na ovom sastanku. — I'm dying of boredom in this meeting.
   Leti crkavamo od vrućine u stanu. — In summer we're dying of the heat in the flat.
3. colloq. (of devices) to die; to conk out; to go dead
   Baterija mi stalno crkava na telefonu. — My phone battery keeps dying.
4. vulg. (of people) to croak; to drop dead
   Ljudi tamo crkavaju, a nikoga nije briga. — People are croaking there, and nobody cares.

Rude when used literally of people dying; figurative uses are colloquial. In the sense 'to suffer' it usually takes od + gen.