HSK 4
火
huǒ名形
fire; urgent; ammunition; fiery or flaming; internal heat (Chinese medicine); hot (popular); surname Huo
做饭以后一定要关火。
Zuò fàn yǐ hòu yí dìng yào guān huǒ.
Always turn off the flame after cooking.
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New in the HSK 3.0 word list at level 4.