HSK 7-9
咧嘴
liězuǐ动
to grin
孩子收到礼物后咧嘴笑了。
Háizi shōudào lǐwu hòu liězuǐ xiào le.
The child broke into a grin after receiving the gift.
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Appears across levels (7-9) in the HSK 3.0 word list.