HSK 7-9
忌口
jìkǒu动
abstain from certain food (as when ill); avoid certain foods; be on a diet
术后病人需要暂时忌口。
Shù hòu bìng rén xū yào zàn shí jì kǒu.
The postoperative patient needs to avoid certain foods temporarily.
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Appears across levels (7-9) in the HSK 3.0 word list.