Definition
快乐 is the standard word for 'happy', used in common greetings like 生日快乐 (Happy Birthday). 高兴 describes a momentary, excited feeling, while 开心 is more casual, meaning 'glad' or 'amused'. 幸福 (HSK4) refers to deep, long-lasting contentment.
adjective
happyjoyful
Examples
- 。Wǒ jīntiān hěn kuài lè.I am very happy today.
- 快乐！Zhù nǐ shēngrì kuài lè!Wish you a happy birthday!
- 。Háizimen zài yìqǐ hěn kuài lè.The children are very happy together.
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