HSK 6
塞
sāi动名
to plug; to stop up; to stuff in; (bound form) a stopper; a cork
请把旧衣服塞进这个袋子。
Qǐng bǎ jiù yī fú sāi jìn zhè ge dài zi.
Please stuff the old clothes into this bag.
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New in the HSK 3.0 word list at level 6.