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Etymology
Per Vasmer, onomatopoeic; cognate with 🇨🇬 and 🇨🇬.

Verb

 * 1)  to peep, to squeak
 * 2)  to utter a peep, to cry out, to moan
 * 3)  to object, to express one's opinion
 * 1)  to object, to express one's opinion