harmless

1. ADJ Something that is harmless does not have any bad effects, especially on people's health. 无害的

This experiment was harmless to the animals. 这个实验对动物无害。

2. ADJ If you describe someone or something as harmless, you mean that they are not important and therefore unlikely to annoy other people or cause trouble. 不会惹麻烦的

He seemed harmless enough. 他似乎不会惹麻烦。