adjective
inflicting or capable of inflicting injury
a harmful drug
Synonyms: bad, damaging, deleterious, detrimental, evil, hurtful, ill, injurious, mischievous, nocent, nocuous, prejudicial, prejudicious
Related Word: baleful, baneful, malefic, malign, malignant, noisome, noxious, pernicious, toxic; insalubrious, unhealthful, unhealthy, unwholesome; dangerous, hazardous, risky, unsafe
Contrasted words: innocuous, inoffensive, nontoxic; beneficent, beneficial, benign, benignant, favorable, helpful, salutary, useful; safe, unhazardous
Antonyms: harmless