samrt

1. (in na samrti) deathbed; dying
   Deda je već bio na samrti kad smo stigli. — Grandpa was already dying when we arrived.
   Na samrti je tražio da vidi sina. — On his deathbed he asked to see his son.
2. formal (mostly in do samrti) death
   Biću ti zahvalan do samrti. — I'll be grateful to you till the day I die.
   Taj dan ću pamtiti do samrti. — I'll remember that day for the rest of my life.

Rarely used on its own: mostly in na samrti "dying" and do samrti "until death". Na samrti is ordinary everyday usage, while do samrti sounds elevated; in everyday speech do smrti or do kraja života is more usual.