- benign - not dangerous to health; not recurrent or progressive (especially of a tumor)
Antonyms: malignant, cancerous
- benign, benignant - pleasant and beneficial in nature or influence; "a benign smile"; "the benign sky"; "the benign influence of pure air"
Antonyms: malign, cancerous, evil, harmful, injurious, malevolent, malignant
- benign - of disposition or manner; "the benign ruler of millions"; "benign intentions"
Antonym: unkind (indirect, via kind)