1. Not injurious to physical or mental health 
2. Not causing disapproval
   "it was an innocuous remark"; "confined himself to innocuous generalities"
   - unobjectionable 
3. Lacking intent or capacity to injure
   - innocent

See also: harmless, innoxious, inoffensive

Antonym: noxious

• mousetrap
• mousey
• moussaka
• mousse
• mousseline de sole
• Moussorgsky
• moustache
• moustache cup
• moustachio
• mousy
• mouth
• mouth bow
• mouth harp
• mouth hole
• mouth off
• mouth organ
• mouth-to-mouth
• mouth-to-mouth resuscitation
• mouth-watering
• mouthbreeder
• mouthful
• mouthless
• mouthlike
• mouthpart
• mouthpiece