1. 无害的;无冒犯之意的
Something that is innocuous is not at all harmful or offensive.

1. lacking intent or capacity to injure

e.g. an innocent prank

Synonym: innocent

2. not injurious to physical or mental health

3. not causing disapproval

e.g. it was an innocuous remark
confined himself to innocuous generalities
unobjectionable behavior

Synonym: unobjectionable