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Etymology
Compare (with different vocalism) 🇨🇬, 🇨🇬, also, 🇨🇬 (1sg. ), 🇨🇬, 🇨🇬, 🇨🇬, and more distantly 🇨🇬, 🇨🇬, 🇨🇬, also , 🇨🇬, 🇨🇬, , 🇨🇬 (infinitive ), 🇨🇬, also , 🇨🇬, etc. Ultimately.

Verb

 * 1) to moo
 * 2) to bellow
 * 3)  to mumble
 * 1)  to mumble