zadaviti

1. to strangle
   Ubica je žrtvu zadavio kaišem. — The killer strangled the victim with a belt.
   Toliko me nervira da bih ga zadavio! — He annoys me so much I could strangle him!
2. (zadaviti se) to choke
   Zamalo sam se zadavio ribljom koskom. — I almost choked on a fish bone.

In the sense 'to choke on', usually with the instrumental: zadaviti se nečim.