/ ˈhɑːmləs; NAmE ˈhɑːrm-/ adjective
1.
harmless (to sb/sth) unable or unlikely to cause damage or harm :
The bacteria is harmless to humans.
2.
unlikely to upset or offend anyone
SYN innocuous :
It's just a bit of harmless fun.
► harm·less·ly adverb :
The missile fell harmlessly into the sea.
► harm·less·ness noun [ U ]