Old English crācettan; related to Old Norse krāka a crow; see creak
Word Origin and History for croak
v.
early 14c., crouken, imitative or related to Old English cracian (see crack (v.)). Slang meaning "to die" is first recorded 1812, from sound of death rattle. Related: Croaked; croaking.
A mixture of crack cocaine and cocaine: A new wave of narcotics with names such as ''croak'' and ''parachute'' is hitting the nation's streets(1980s+ Narcotics)
verb
To die: I had the horse trained, then he up and croaked on me(1812+)
To kill; murder: He croaked a screw at Dannemora(1848+)