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Showing results for harmful.
Definitions

harmful

[hahrm-fuhl] / ˈhɑrm fəl /
ADJECTIVE
injurious, hurtful
Synonyms
STRONGEST
adverse bad catastrophic damaging destructive detrimental disadvantageous disastrous inimical noxious painful pernicious risky ruinous sinful toxic unhealthy unsafe
WEAK
baleful baneful calamitous cataclysmic consumptive corroding corrupting crippling deleterious dire evil harassing incendiary internecine malefic malicious malignant menacing mischievous murderous nocuous pestiferous pestilential sinister subversive undermining unwholesome virulent
Antonyms
STRONGEST
advantageous aiding assisting beneficial favorable fortunate good harmless healthy helpful honest kind lucky profitable safe upright

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

These safeguards are designed to prevent me from engaging in harmful or inappropriate behavior.

From The Wall Street Journal • Apr. 12, 2026

Consumers can minimize their risk of exposure to harmful food chemicals by choosing organic produce over non-organic produce and researching the nutritional and processing information for their favorite products.

From Salon • Apr. 11, 2026

The models could be employed for harmful ends either “inadvertently or intentionally,” he said.

From MarketWatch • Apr. 11, 2026

In a statement, Meta said: "We will not allow trial lawyers to profit from our platforms while simultaneously claiming they are harmful."

From BBC • Apr. 10, 2026

Everybody resents this inconvenience, and everyone becomes the ruler’s enemy; and these are enemies that can be harmful, since, although conquered, they remain in their own homes.

From "The Prince" by Niccolò Machiavelli

Vocabulary lists containing harmful

Earth Day

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Unfavorable

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