Cluck

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late 15th century: imitative, corresponding to Danish klukke, Swedish klucka .

wiktionary

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From Middle English clokken, clocken, from Old English cloccian(“to cluck, make a noise”), from Proto-Germanic *klukkwōną(“to make a sound, cluck”), of imitative origin. Cognate with Scots clok, clock(“to cluck”), Dutch klokken(“to cluck”), Low German klucken(“to cluck”), German glucken(“to cluck”), Danish klukke(“to cluck”), Swedish klucka(“to cluck”), Icelandic klökkva(“to sob, whine, cluck”).

etymonline

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cluck (v.)

"to utter the call or cry of a hen," Old English cloccian originally echoic. Compare Turkish culuk, one of the words for "turkey;" Greek klozein, Latin glocire, German glucken. Related: Clucked; clucking.

cluck (n.)

1703, "sound made by a hen," from cluck (v.). Slang meaning "stupid person" (chickens and turkeys are famously foolish) is from 1927.