How do you write the word happiness in Chinese?

The word "happiness" can be written in Chinese in two main ways, depending on the context:

1. 幸福 (xìng fú): This is the most common and general translation of "happiness." It refers to a state of well-being, contentment, and joy.

2. 快乐 (kuài lè): This translation emphasizes the feeling of joy and pleasure. It is more appropriate when referring to something that makes you feel happy in the moment.

So, depending on the specific meaning you want to convey, you can use either 幸福 or 快乐.