Caw

google

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late 16th century: imitative.

wiktionary

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Onomatopoeic

etymonline

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caw (v.)

"make a sound like a crow, raven, etc.," 1580s, imitative. "Similar imitative forms occur in many and diverse languages, to express the cry or as a name for the crow and other corvine birds" [Century Dictionary]. Related: Cawed; cawing.

caw (n.)

1660s, from caw (v.).