harmful
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harm·ful

adjective \ˈhärm-fəl\

Definition of HARMFUL

: of a kind likely to be damaging : injurious
harm·ful·ly \-fə-lē\ adverb
harm·ful·ness noun

Examples of HARMFUL

  1. <DDT has been proven to be extremely harmful to the environment.>

First Known Use of HARMFUL

14th century

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