You use benign to describe someone who is kind, gentle, and harmless.
例句
They are normally a more benign audience...他們通常觀看時比較溫和。Critics of the scheme take a less benign view.對該方案的批評就沒有這么溫和了。
ADJ-GRADED
沒有危害的
A benign substance or process does not have any harmful effects.
例句
We're taking relatively benign medicines and we're turning them into poisons.我們服的藥相對來說藥性溫和，但是我們卻在把它們變成毒藥。
ADJ
（腫瘤）良性的
A benign tumour will not cause death or serious harm.
例句
It wasn't cancer, only a benign tumour.這不是癌癥，只是良性腫瘤。
ADJ-GRADED
（條件、環境）良好的，宜人的
Benign conditions are pleasant or make it easy for something to happen.
例句
They enjoyed an especially benign climate...他們那里的氣候非常宜人。This plunge came in a time of relatively benign economic conditions.這次大跌出現在相對良好的經濟環境下。
PHRASE
不作為；善意忽視；順其自然
If you describe someone's approach to a problem as one of benign neglect, you disapprove of the fact that they are doing nothing and hoping that the problem will solve itself.
例句
America and Japan have settled back into a policy of benign neglect of their currencies.美國和日本又回到了不作為貨幣政策的老路。