verb, adjective, modal particle · out of order, malfunctioning, or damaged

我的自行车坏了。

adjective, particle · morally bad, evil, or of poor quality

这是一个坏主意。

adjective, verb, modal particle · used as a suffix to indicate an extreme or unbearable degree

听到这个消息，他乐坏了。

verb, adjective · rotten or decayed, specifically regarding food

牛奶坏了，不能喝了。

adjective, verb · to ruin, spoil, or damage something abstract like a reputation, plan, or atmosphere

千万别因为这点小事坏了大局。