izdisati

1. to exhale; to breathe out
   Polako udišite kroz nos i izdišite kroz usta. — Breathe in slowly through your nose and breathe out through your mouth.
   Dok trči, izdiše na svaki drugi korak. — When running, he exhales on every second step.
2. formal (of a person, animal) to be dying; to breathe one's last
   Stari pas je izdisao u njegovom naručju. — The old dog was dying in his arms.

The perfective is izdahnuti, which also often means "to die".