HSK 7-9
掉头
diàotóu动
to turn one's head; to turn round; to turn about
前方封路司机只能掉头。
Qián fāng fēng lù sī jī zhǐ néng diào tóu.
The driver could only turn around because the road ahead was closed.
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Appears across levels (7-9) in the HSK 3.0 word list.