innocuous in WordNet English dictionary

1. lacking intent or capacity to injure
   "an innocent prank"
   innocent  innocuous 
   
2. not injurious to physical or mental health
   innocuous 
   
3. not causing disapproval
   "it was an innocuous remark"; "confined himself to innocuous generalities"; "unobjectionable behavior"
   innocuous  unobjectionable