harmful

harm·ful

 (härm′fəl)
adj.
Causing or capable of causing harm; injurious.

harm′ful·ly adv.
harm′ful·ness n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

harmful

(ˈhɑːmfʊl)
adj
causing or tending to cause harm; injurious
ˈharmfully adv
ˈharmfulness n
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

harm•ful

(ˈhɑrm fəl)

adj.
causing or capable of causing harm; injurious.
[before 1000]
harm′ful•ly, adv.
harm′ful•ness, n.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

harmful

  • catalytic converter - A device with a catalyst for converting pollutant gases into less harmful ones.
  • allergen - Though allergens are not harmful themselves, when they are combined with certain antibodies, a reaction (i.e. the allergy) liberates substances that damage body cells and tissues.
  • intrigant - A person who plots something illicit or harmful.
  • nocuous - Meaning "harmful, noxious," it is based on Latin nocere, "to hurt."
Farlex Trivia Dictionary. © 2012 Farlex, Inc. All rights reserved.

harmful

If something is harmful to someone or harmful for them, it has a bad effect on them.

Too much salt can be harmful to a young baby.
Potassium could be harmful for those with impaired kidneys.

You can also say that something is harmful to a thing.

Excessive amounts may be harmful to the skin.
Collins COBUILD English Usage © HarperCollins Publishers 1992, 2004, 2011, 2012
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.harmful - causing or capable of causing harm; "too much sun is harmful to the skin"; "harmful effects of smoking"
disadvantageous - constituting a disadvantage
malign - evil or harmful in nature or influence; "prompted by malign motives"; "believed in witches and malign spirits"; "gave him a malign look"; "a malign lesion"
destructive - causing destruction or much damage; "a policy that is destructive to the economy"; "destructive criticism"
noxious - injurious to physical or mental health; "noxious chemical wastes"; "noxious ideas"
offensive - causing anger or annoyance; "offensive remarks"
painful - causing physical or psychological pain; "worked with painful slowness"
toxic - of or relating to or caused by a toxin or poison; "suffering from exposure to toxic substances"
unwholesome - detrimental to physical or moral well-being; "unwholesome food"; "unwholesome habits like smoking"
harmless - not causing or capable of causing harm; "harmless bacteria"; "rendered the bomb harmless"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.

harmful

adjective damaging, dangerous, negative, evil, destructive, hazardous, unhealthy, detrimental, hurtful, pernicious, noxious, baleful, deleterious, injurious, unwholesome, disadvantageous, baneful, maleficent the harmful effects of smoking
beneficial, harmless, good, safe, healthy, helpful, wholesome, innocuous
Collins Thesaurus of the English Language – Complete and Unabridged 2nd Edition. 2002 © HarperCollins Publishers 1995, 2002

harmful

adjective
The American Heritage® Roget's Thesaurus. Copyright © 2013, 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Translations
ضَارّمُضِر، مُؤْذٍ
škodlivý
skadelig
schädlich
επιβλαβήςβλαβερόςβλαπτικός
nocivoperjudicialdañinomalopernicioso
vahingollinen
nuisiblepérilleuxredoutabledangereux
štetanškodanškodljiv
ártalmas
skaîlegur
dannosonocivo
有害な
유해한
schadelijk
skadelig
szkodliwy
prejudicial
вредный
škodljiv
skadlig
เป็นอันตราย
zararlı
có hại
有害的

harmful

[ˈhɑːmfʊl] ADJ [substance, chemical] → dañino, nocivo; [effects, consequences] → perjudicial, pernicioso; (to reputation) → perjudicial (to para) tobacco is harmful to the healthel tabaco perjudica seriamente la salud
the chemical is not harmful to plantsel producto químico no es nocivo para or no daña las plantas
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

harmful

[ˈhɑːrmfʊl] adj [substance, bacteria] → nuisible; [effects] → nuisible
harmful chemicals → des produits chimiques nuisibles
to be harmful to sb/sth (physically)nuire à qn/qch
Collins English/French Electronic Resource. © HarperCollins Publishers 2005

harmful

adjschädlich (to für); remarksverletzend; harmful to one’s healthgesundheitsschädlich
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007

harmful

[ˈhɑːmfʊl] adj harmful (to)dannoso/a (a), nocivo/a (a)
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995

harm

(haːm) noun
damage; injury; distress. I'll make sure you come to no harm; He meant no harm; It'll do you no harm to go.
verb
to cause (a person) harm. There's no need to be frightened – he won't harm you.
ˈharmful adjective
doing harm. Medicines can be harmful if you take too much of them.
ˈharmless adjective
not dangerous or liable to cause harm. Don't be frightened of that snake – it's harmless.
ˈharmlessly adverb
ˈharmlessness noun
out of harm's way
in a safe place. I'll put this glass vase out of harm's way, so that it doesn't get broken.
Kernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd.

harmful

ضَارّ škodlivý skadelig schädlich επιβλαβής nocivo vahingollinen nuisible štetan dannoso 有害な 유해한 schadelijk skadelig szkodliwy prejudicial вредный skadlig เป็นอันตราย zararlı có hại 有害的
Multilingual Translator © HarperCollins Publishers 2009

harmful

a. perjudicial, dañino-a.
English-Spanish Medical Dictionary © Farlex 2012

harmful

adj nocivo, dañino
English-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
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