HSK 7-9
粗鲁
cūlǔ形
coarse; crude (in one's manner); boorish
随意打断别人说话很粗鲁。
Suí yì dǎ duàn bié rén shuō huà hěn cū lǔ.
Interrupting others casually is rude.
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Appears across levels (7-9) in the HSK 3.0 word list.