härm'fəl
Capable of causing injury or death, especially by chemical means; poisonous.
Having a bad omen; inauspicious; unlucky.
Causing harm or injury
Not good; unfavorable; negative.
unharmful (antonym)
Not harmful.
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Consuming or tending to consume.
Distressing or embarrassing:
Causing great injury, destruction, or ruin; fatal; deadly
Capable of causing utter destruction or serving to destroy utterly:
Very harmful, dangerous, or virulent
Containing or consisting in sin; contrary to the will of a god, goddess, gods and/or goddesses.
Portending harm; ominous.
Having a harmful effect; injurious:
carcinogenic (related)
dangerous (related)
Dire is defined as something that is urgent.
Causing harm or injury
Beguiling but harmful; alluring:
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Causing devastation
Of the nature of a disaster; causing great harm, damage, etc.; calamitous
(Informal) Capable of devastating or overwhelming:
undetermining
Causing harm or injury
Tending or likely to cause destruction
Causing harm or injury
Very destructive; most unfortunate; disastrous
Of high price or value; expensive:
fraught with evil
Causing harm or injury
extirpative
Of, relating to, or pertaining to an extirpation.
Causing harm or injury
Fierce; terrible; cruel
Very wicked or cruel
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Not healthy; detrimental to health.
Promising trouble; unfavorable; unfortunate; unpropitious
Causing suffering; hard to bear; severe
Conceivable; imaginable:
Causing or capable of causing death; fatal or deadly
Malevolent is defined as someone or something that is harmful or evil.
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Of or caused by mephitis
(Zool.) Having a poison gland or glands and able to inflict a poisonous wound by biting or stinging
Full of painful yearning or sorrow:
Causing harm or injury
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Open to objection
Extremely vexatious or difficult
Resulting or likely to result in misfortune; inauspicious:
Showing ill will; malicious
sinistrous
Part or all of this entry has been imported from the 1913 edition of Webster's Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
Offensive to the senses; disgusting, unpleasant, nauseous; foul, fetid, especially having an undesirable smell; sickening, nauseating.
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poisonous (related)
Capable of injuring or killing by or as by poison; containing, or having the effects of, a poison; toxic; venomous
wicked (related)
Naughty in a playful way; mischievous
Involving or resulting in substantial, often ruinous medical expense:
Oppressively tiresome
Causing damage or harm; injurious.
Depending on chance; risky.
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Very unpleasant; objectionable
Harmful to the mind or morals; corrupting:
Causing or tending to cause harm, especially to a legal case:
Bringing or tending to bring ruin; very destructive or harmful; disastrous
Characterized by or symptomatic of disturbed mental health:
Not safe; dangerous.
harmless (antonym)
Not intended to harm or offend; inoffensive.
helpful (antonym)
The definition of helpful is someone or something that is useful, that provides assistance or aid, or that is prone to providing aid.
aiding (antonym)
injurious, hurtful
assisting (antonym)
injurious, hurtful
nice (antonym)
Used as an intensive with and :
(Computing, programming, slang) undesirable; harmful; bad practice
help (related)
Causing harm or injury
undesirable (related)
harm (related)
The definition of mischievous is someone or something that causes harm or likes to play and annoy with tricks.
Having or exerting a malignant influence.
Like an enemy; hostile; unfriendly
Causing harm or injury
Causing or intending harm or evil; wicked:
Tending or seeking to subvert, overthrow, or destroy (an established government, institution, belief, etc.)
Causing or designed to cause fires, as certain substances, bombs, etc.
Concerning or involving calamity, disastrous.
Possessed, produced, or influenced by a demon:
Very great; extreme
Unfavorable; harmful
Extremely hostile or malicious:
Of or pertaining to a cataclysm; causing great destruction or upheaval; catastrophic.
Causing harm or injury
Like or constituting a pestilence; widespread and deadly
Containing organisms that cause contagious diseases
Causing harm or injury
morbific
Causing or leading to disease
Deteriorated from the normal or standard
(Slang) Extraordinary; remarkable
Causing harm or injury
habit-forming
Capable of leading to physiological or psychological dependence:
Really intending what is said; being in earnest; not jesting or deceiving; meaningful.
fraught with harm
Causing harm or injury
doing harm
Causing harm or injury
Painful to the touch; tender.
Plain and direct, although distressing in effect
pure (antonym)
(Philosophy) Free of empirical elements:
healthful (antonym)
Healthy.
ominous (related)
Specifically, giving indication of a coming ill; being an evil omen; threatening; portentous; inauspicious.
Likely to cause death; deadly
demolitionary
Causing harm or injury
Find another word for harmful. In this page you can discover 123 synonyms, antonyms, idiomatic expressions, and related words for harmful, like: menacing, hurtful, toxic, ill-omened, wounding, bad, unharmful, baleful, nocuous, consumptive and painful.
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