HSK 7-9
缝
féng动
to sew; to stitch
奶奶正用细线缝补旧衣。
Nǎi nai zhèng yòng xì xiàn féng bǔ jiù yī.
Grandma is mending old clothes with fine thread.
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Appears across levels (7-9) in the HSK 3.0 word list.