- They say that exposure to low level radioactivity is harmless.
- These normally harmless substances combine to form a highly poisonous gas.
- Those who think this is a harmless recreational drug are being naive.
- For a long time, tobacco was thought to be a harmless.
- They weren't having an affair - it was a harmless flirtation and nothing more.
Thesaurus: synonyms and related words
adverb uk /ˈhɑːm.ləs.li/ us /ˈhɑːrm.ləs.li/
noun [ U ] uk /ˈhɑːm.ləs.nəs/ us /ˈhɑːrm.ləs.nəs/