Word parts harm + -less Pronunciation (US) IPA (key): /ˈhɑrmləs/ (UK) IPA (key): /ˈhɑːmləs/ Audio (US)(file) Adjective Positive harmless Comparative more harmless Superlative most harmless If something is harmless, it does not cause harm or danger. Synonym: safe Antonym: harmfulWikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads