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dangerous

adjective
DAYN-juh-ruhs/ˈdeɪnd͡ʒ(ə)ɹəs/

2 meanings of dangerous

Practice

  1. 1
    riskyadjective
    Likely to hurt or harm someone or something.

    Like a sharp knife left where a small child could grab it.

    The broken glass on the floor was dangerous.

    Lions can be very dangerous when they feel cornered.

    UsageSay dangerous for someone, or it's dangerous to do something.

    Note
  2. 2
    gravely illadjectivedated
    In danger of dying, usually because of a serious illness.

    Similarcritical

    Note

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Origin

It comes from Old French dangereus, meaning threatening or difficult, from danger.

Checked 5 Nov 2026 · 2 facts

  • Dangerous comes from Old French dangereus, meaning threatening or difficult. en.wiktionary.org
  • The French adjective derives from the noun underlying French danger. en.wiktionary.org