harmful

Things that are harmful hurt people, or are likely to hurt them. Listening to loud music through headphones can be harmful to your hearing.

Harmful is an adjective that comes in handy when you're talking about things that cause injury to someone or damage something. Burning coal can be harmful to the environment, and eating too much candy can be harmful for your teeth. Harmful words can hurt someone's feelings and harmful actions might put them in danger. The Old English hearm, "hurt, evil, or grief," is at the root of harmful.

DEFINITIONS OF: harmful

1

adj causing or capable of causing harm

“too much sun is harmful to the skin”
harmful effects of smoking”
Synonyms
disadvantageous
constituting a disadvantage
malign
evil or harmful in nature or influence
destructive
causing destruction or much damage
abusive
characterized by physical or psychological maltreatment
bad
capable of harming
bruising
causing mental or emotional injury
deleterious, hurtful, injurious
harmful to living things
calumniatory, calumnious, defamatory, denigrating, denigrative, denigratory, libellous, libelous, slanderous
(used of statements) harmful and often untrue; tending to discredit or malign
catastrophic, ruinous
extremely harmful; bringing physical or financial ruin
counterproductive
tending to hinder the achievement of a goal
damaging, detrimental, prejudicial, prejudicious
(sometimes followed by `to') causing harm or injury
ill
resulting in suffering or adversity
insidious, pernicious, subtle
working or spreading in a hidden and usually injurious way
mischievous
deliberately causing harm or damage
nocent
having a tendency to cause harm
stabbing, wounding
causing physical or especially psychological injury
noxious
injurious to physical or mental health
offensive
causing anger or annoyance
painful
causing physical or psychological pain
toxic
of or relating to or caused by a toxin or poison
unwholesome
detrimental to physical or moral well-being
Antonyms:
harmless
not causing or capable of causing harm
benign, benignant
pleasant and beneficial in nature or influence
innocent, innocuous
lacking intent or capacity to injure
innocuous
not injurious to physical or mental health
painless
not causing physical or psychological pain
safe
free from danger or the risk of harm
atoxic, nontoxic
not producing or resulting from poison
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