benignest

Adjective

benign (comparative benigner or more benign, superlative benignest or most benign)

1. 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.1826, [Mary Shelley], chapter IX, in The Last Man. […], volume I, London: Henry Colburn, […], →OCLC
2. Of a climate or environment, mild and favorable.
3. (in-compounds) Not harmful to the environment.
   • an ozone-benign refrigerant
4. Not posing any serious threat to health; not particularly aggressive or recurrent.
   • a benign tumor

   Synonyms:

   nonmalignant

   Antonyms:

   malignant