adjective

benign

benign, harmless, gentle, kind

The tumor was benign, not cancerous.

The tumour was benign, not cancerous.

He has a benign and friendly manner.

He has a benign and friendly manner.

((noun)) (medical) not harmful. The doctor said the growth was benign.

((noun)) gentle and kind. She has a benign smile.

Synonyms: harmless, gentle, kind; Antonyms: malignant, harmful

From Latin 'benignus', from 'bene' (well) + 'gignere' (to beget), meaning 'of a good kind'.

In medicine, it's the opposite of 'malignant'. Remember that 'be nice' sounds a bit like 'benign'.

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