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harmful

adjective

  1. tending to cause damage
L12292 on Wikidata ↗

Wiktionary

Pronunciation: /ˈhɑːmfl̩/ / /ˈhɑɹmfl̩/

adj

Etymology: 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.

  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.