croak

From Middle English croken, crouken, (also represented by craken > crake), back-formation from Old English crācettan (“to croak”) (also in derivative crǣcetung (“croaking”)), from Proto-Germanic krēk-, from Proto-Indo-European greh₂-g-, from greh₂-k-, of onomatopoeic origin. See also Swedish kråka, German krächzen, Sanskrit गर्जति (garjati, “to growl”); also compare Latin grāculus (“jackdaw”), Serbo-Croatian grákati. More at crack, crake and craic.