The crowd kicked up a noisy fuss at the door, demanding an explanation.
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唣 does not stand alone in modern Chinese. It appears only in 啰唣 (to clamor, to make a row), and is a variant of 唕. Built on the mouth radical 口, it belongs with other 'noise' characters.
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Old vernacular usage, common in classic novels. 唣 is rare in modern writing outside the fixed pair 啰唣.