izdahnuti

1. to exhale; to breathe out
   Duboko udahnite, pa polako izdahnite. — Take a deep breath, then slowly breathe out.
   Izdahnuo je dim i nasmejao se. — He exhaled the smoke and laughed.
2. to die; to breathe one's last
   Ranjeni vojnik je izdahnuo na putu do bolnice. — The wounded soldier died on the way to the hospital.

The imperfective is izdisati.