形容词

1. 和蔼的；温和的；慈祥的
You use benign to describe someone who is kind, gentle, and harmless.

1. pleasant and beneficial in nature or influence

e.g. a benign smile
the benign sky
the benign influence of pure air

Synonym: benignant

2. kindness of disposition or manner

e.g. the benign ruler of millions
benign intentions

3. not dangerous to health
not recurrent or progressive (especially of a tumor)