HSK 7-9
表白
biǎobái动
to explain oneself; to express; to reveal one's thoughts or feelings; declaration
他终于鼓起勇气向她表白。
Tā zhōng yú gǔ qǐ yǒng qì xiàng tā biǎo bái.
He finally found the courage to declare his feelings to her.
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Appears across levels (7-9) in the HSK 3.0 word list.