harmful

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English

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Alternative forms

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Etymology

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From Middle English harmful, from Old English *hearmful (suggested by hearmfullīċ (harmful; hurtful)), equivalent to harm +‎ -ful.

Cognate with German harmvoll, Danish harmfuld, Swedish harmfull.

Pronunciation

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Adjective

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harmful (comparative harmfuller or more harmful, superlative harmfullest or most harmful)

  1. Causing or likely to cause harm or damage; injurious.
    Wear a hat to protect your skin from harmful sunlight.
    Smoking is harmful to the lungs.
    Burning fossil fuels is harmful to the environment.

Synonyms

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Antonyms

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Derived terms

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Collocations

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Translations

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See also

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