快乐

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The Chinese word 快乐 (kuàilè) for "happiness" is composed of two characters: 快 (kuài) and 乐 (lè). The character 快 originally meant "to walk quickly" or "to be quick", and later extended to mean "happy" or "joyful". The character 乐 originally meant "music" or "to enjoy music", and later extended to mean "happiness" or "joy". The combination of these two characters creates the word 快乐, which carries the meaning of "happiness" or "joy". It is often used to describe a state of contentment, satisfaction, or well-being.