开心 kāi xīn
“to feel happy; to rejoice; to have a great time”
adjective, verb, adjective / nounHSK 5 · 2021 list level 2Traditional 開心
新HSK等级2025 HSK 3.0 syllabus level
开心 appears in the November 2025 exam syllabus in the following numbered entry. Levels refer to the listed reading and use, not every meaning.
- Entry 729: 开心 kāixīn — Level 3; official annotation 3 (形). PDF page 98
Separate from the HSK 2.0 and 2021 list labels above. Compare the three lists.
用法How to use 开心
开心 is an adjective meaning 'happy, glad, having fun', used after 很/特别/非常 or with 极了: 很开心／开心极了. It also appears in the fixed pattern 玩得开心 and before 地 as an adverb (开心地笑了). It is mainly predicative and describes a mood rather than taking an object.
例句Example sentences
- 听到这个消息，大家都很开心。tīng dào zhè ge xiāo xi, dà jiā dōu hěn kāi xīn.Everyone was very happy to hear the news.
- 孩子们在公园里玩得很开心。hái zi men zài gōng yuán lǐ wán de hěn kāi xīn.The children had a great time playing in the park.
- 能和你一起工作，我很开心。néng hé nǐ yì qǐ gōng zuò, wǒ hěn kāi xīn.I'm very happy to be able to work with you.
易混词Easily confused
开心vs高兴
Both mean 'happy', but 高兴 is more general and can take a clause (我很高兴你来了); 开心 is more colloquial and stresses inner joy, often in 玩得开心／开心极了.