innocuous

adjectives

not injurious to physical or mental health
antonym
is similar to
having no adverse effect
see also
not causing or capable of causing harm
"harmless bacteria"; "rendered the bomb harmless"
not causing disapproval
"it was an innocuous remark"; "confined himself to innocuous generalities"; "unobjectionable behavior"
lacking intent or capacity to injure
"an innocent prank"