harmlessadjectiveuk /ˈhɑːm.ləs/ us /ˈhɑːrm-/
- 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.