Synonyms of harmful
- 1. harmful (vs. harmless), abusive, bad, bruising, deleterious, hurtful, injurious, calumniatory, calumnious, defamatory, denigrative, denigrating, denigratory, libellous, libelous, slanderous, catastrophic, ruinous, counterproductive, damaging, detrimental, prejudicial, prejudicious, ill, insidious, pernicious, subtle, mischievous, nocent, stabbing, wounding, destructive, disadvantageous, malign, noxious, offensive, painful, toxic, unwholesome
- usage: causing or capable of causing harm; "too much sun is harmful to the skin"; "harmful effects of smoking"
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Definition and meaning of harmful (Dictionary)