#1 croak v. [die, decease, perish, go, exit, pass away, expire, pass, kick the bucket, cash in one's chips, buy the farm, conk, give-up the ghost, drop dead, pop off, choke, snuff it] pass from physical life and lose all bodily attributes and functions necessary to sustain life; "She died from cancer"; "The children perished in the fire"; "The patient went peacefully"; "The old guy kicked the bucket at the age of 102". wn
#2 croak n. [croaking] a harsh hoarse utterance (as of a frog). wn
#3 croak v. [cronk] utter a hoarse sound, like a raven. wn
#4 croak v. [murmur, mutter, grumble, gnarl] make complaining remarks or noises under one's breath; "she grumbles when she feels overworked". wn
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