开心 kāixīn HSK2 happy Definitions Defs Origin Strokes Stroke Words Sentences Sents Showing: mock All meanings 204 kāixīn 204 happy 203mock 1 1 sentence for 开心 (kāixīn — mock) 别拿他开心了,他会当真的。 bié ná tā kāixīn le, tā huì dàngzhēn de. Stop teasing him; he'll take it seriously. Source: Dong Chinese Dictionary