fun

1. N-UNCOUNT You refer to an activity or situation as fun if you think it is pleasant and enjoyable and it causes you to feel happy. 乐趣

It's been a learning adventure and it's also been great fun. 那是一次很受教育的冒险活动，也是极大的乐趣。

It could be fun to watch them. 看他们会是乐趣。

2. N-UNCOUNT If you say that someone is fun, you mean that you enjoy being with them because they say and do interesting or amusing things. 有趣的人[表赞许]

Liz was fun to be with. 莉兹是与之相处有趣的人。

3. ADJ If you describe something as a fun thing, you mean that you think it is enjoyable. If you describe someone as a fun person, you mean that you enjoy being with them. 令人愉快的[非正式] [ADJ n]

It was a fun evening. 那是个令人愉快的夜晚。

4. PHRASE If you do something for fun or for the fun of it, you do it in order to enjoy yourself rather than because it is important or necessary. 为了好玩

We used to drive too fast, just for fun. 我们过去常常开得太快，就为了好玩。

5. PHRASE If you do something in fun, you do it as a joke or for amusement, without intending to cause any harm. 闹着玩儿地

Don't say such things, even in fun. 别说这样的话，即使是闹着玩儿。

6. PHRASE If you make fun of someone or something or poke fun at them, you laugh at them, tease them, or make jokes about them in a way that causes them to seem ridiculous. 拿…开玩笑

Don't make fun of me. 别拿我开玩笑。