磨mo4牙ngaa4

mo4 ngaa4mó yá

English

to grind one's teeth (during sleep)
pointless arguing
(coll.) molar
bruxism, grinding one's teeth

粵語 — Cantonese

（通常係無意識咁）將上下排牙齒相互摩擦

Examples

佢瞓覺嗰陣不斷喺度磨牙。
He was constantly grinding his teeth as he slept.

Sources: cc-cedict, rime-cantonese, words.hk

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