na-adjective, noun which may take the genitive case particle 'no', noun
harmless; non-harmful
Describes something that causes no harm, damage, or ill effects. The target of safety is often marked with に, as in 人体に無害 or 環境に無害.
Antonyms: 有害 (ゆうがい)
This paint is harmless to the human body.
I want to choose a detergent that is harmless to the environment.
This spray is harmless to the human body.
This detergent is harmless to the environment.
That insect is a harmless type, so there's no need to worry.
innocent passage