benign

adjective

be·nign | \ bi-ˈnīn

Definition of benign

1a : of a mild type or character that does not threaten health or life especially : not becoming cancerous a benign lung tumor

b : having no significant effect : harmless environmentally benign

2 : of a gentle disposition : gracious a benign teacher

3a : showing kindness and gentleness benign faces

b : favorable, wholesome a benign climate