A croak is the low, hoarse sound a frog makes. Crows and people with sore throats can croak, too. It’s also a slang word for “die.” When people croak, they need either a glass of water or an undertaker.
Croak is a noun or a verb. A bullfrog’s croak can be very loud. A parched cowboy might croak, “howdy.” Another meaning of the word is "die," as in, "I'm sorry your hamster's dead, but you knew he was going to croak soon.” This kind of croak came from the popular idea that people make a distinctive sound just before they die, a "death rattle." Now there’s something to look forward to!