DictionaryRoot: cloccian
Old English
cloccian
utter a hen’s cry
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noun / verb
cluck
KLUK/klʌk/
A short henlike or tongue-clicking sound, or the act of making it.
Etymology
Old English cloccian imitated the hen’s call rather than describing it through other roots. The modern verb preserves that direct connection between the word’s sound and the noise it names.