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harm·ful

harmful

 
 
pronunciation:
harm fl
features:
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part of speech: adjective
definition: causing or likely to cause harm; dangerous.
Smoking is harmful to your health.
synonyms:
damaging, dangerous, detrimental
antonyms:
beneficial
similar words:
adverse, bad, ill
derivations: harmfully (adv.), harmfulness (n.)
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The word harmful contains the following part:
-ful1 Old English adjective-forming suffix that means full of
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The suffix -ful1 attaches to native English nouns to form adjectives.