harmful
causing or capable of causing harm; injurious: a harmful idea;a harmful habit.
Origin of harmful
1Other words for harmful
Opposites for harmful
Other words from harmful
- harm·ful·ly, adverb
- harm·ful·ness, noun
- quasi-harmful, adjective
- qua·si-harm·ful·ly, adverb
- un·harm·ful, adjective
- un·harm·ful·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use harmful in a sentence
When we act contentiously and harmfully and passionately and violently, to what have we declined?
Wherever Government interference operates at all, it is almost sure to operate harmfully.
Speculations from Political Economy | C. B. ClarkeIf the green parrot is less harmfully mischievous than the crow he is far more offensively noisy.
Birds of the Plains | Douglas DewarHe glared harmfully, but saw Singleton shut his book, and his little beady eyes began to roam from berth to berth.
The Nigger Of The "Narcissus" | Joseph ConradIt has also been found by opticians and doctors that hardly anything will affect the eyes harmfully quicker than gum-chewing.
Health, Happiness, and Longevity | Louis Philippe McCarty
British Dictionary definitions for harmful
/ (ˈhɑːmfʊl) /
causing or tending to cause harm; injurious
Derived forms of harmful
- harmfully, adverb
- harmfulness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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