You would never have guessed his intentions from the benign expression on his face.
He thought of himself as a benign leader.
Her face was gentle and benign.
📒 not causing damage or harm
The industry's environmental impact is relatively benign, even positive.
environmentally benign cleaning products
Many parents adopt a policy of benign neglect —making sure children are fed and clothed and attending school, but leaving them to entertain themselves out of school.
📒 not dangerous or likely to cause death
She is recovering after surgery to remove a benign tumour.