benign

Kind; gentle; mild.

But though we both entertained these ideas, we differed in their application. Resentment added also a sting to my censure; and I reprobated Raymond's conduct in severe terms. Adrian was more benign, more considerate.

I people my world with benign spirits. Everything talks to me and I respond to it.

mild and favorable

Not harmful to the environment.

an ozone-benign refrigerant

Not posing any serious threat to health; not particularly aggressive or recurrent.

a benign tumor

Despite the gruesome way it looks, cottontail rabbit papillomavirus is often benign, and many rabbits end up fighting it off on their own.