形容詞 benign:

1. not dangerous to health; not recurrent or progressive (especially of a tumor)
2. pleasant and beneficial in nature or influence
   同義詞：benignant
3. kindness of disposition or manner

1. The benign weather brought North America a bumper crop.
   溫和的氣候給北美帶來(lái)大豐收。
2. A benign tumour will not cause you any fatal harm.
   良性腫瘤不會(huì)對(duì)你有致命的傷害。
3. Is the growth benign or cancerous?
   這個(gè)腫瘤是良性的還是癌腫性的?
4. My mother's character is very benign.
   我母親非常慈祥。

be.nign

adj.（形容詞）
Of a kind and gentle disposition.
善良的：性情善良與溫和的
Showing gentleness and mildness.See Synonyms at kind
溫厚的：表現(xiàn)溫和與溫柔的參見(jiàn) kind
Tending to exert a beneficial influence; favorable:
有利的：易于產(chǎn)生有益影響的；有利的：
例句：
the benign influence of pure air.See Synonyms at favorable
純凈空氣的有益影響參見(jiàn) favorable

Medicine Of no danger to health; not recurrent or progressive; not malignant:
【醫(yī)學(xué)】 良性的：對(duì)健康無(wú)害的；非復(fù)發(fā)性或漸進(jìn)性的；非惡性的：
例句：
a benign tumor.
良性腫瘤

來(lái)源：
Middle English benigne
中古英語(yǔ) benigne
from Old French
源自 古法語(yǔ)
from Latin benignus * see gen…-
源自 拉丁語(yǔ) benignus *參見(jiàn) gen…-

【引伸】
benign.ly
adv.（副詞）