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Added 1 October 2026

dangerous

/ˈdeɪn.ʒ(ə.)ɹəs/ adjective

In Latin: perīculōsus Wiktionary

adjective Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about dangerous at Wordnik → Where our words come from →

Full of danger.
Railway crossings without gates are highly dangerous.
Causing danger; ready to do harm or injury.
In a condition of danger, as from illness; threatened with death.

Origin

From Middle English daungerous (“difficult, severe, domineering, arrogant, fraught with danger”), dangerous, from Anglo-Norman [Term?], from Old French dangereus (“threatening, difficult”), from dangier. Equivalent to danger + -ous. Displaced native Old English frēcne.

From Wiktionary, via Kaikki.org (CC BY-SA)

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