Etymologically

dangereux

Etymology and origin of the French word dangereux

Confidence
Established
Formation
Derivation
First attested
early 13th century, Reclus de Molliens (dangereus)
Ultimate origin
Latin (dominus)
Etymology tree
inherited borrowed derived
French danger
French dangereux

Pronunciation

  • IPA: /dɑ̃ʒ.ʁø/[1]
  • IPA: /dɑ̃.ʒə.ʁø/[1]

Forms

dangereux (feminine dangereuse, masculine plural dangereux, feminine plural dangereuses)[1] Old French dangereus.[1][2]

Etymology

It is formed from French danger + -eux.[3][4][5][6][1] “Danger”, Old French “dangier”, comes from a late Latin “*domniarium” “power”, from Latin dominus (“lord, master”).[7][6] The Medieval Latin nickname “Dangerosa” borne by a woman in 1060 shows that the adjective already existed.[3][7]

It is the source of English dangerous.[6]

Earliest recorded meaning

Its sense in the first records, in Reclus de Molliens (early 13th century), is unclear: perhaps “weak”, perhaps “acting rashly”; the Grand Robert and the GLLF give “difficult” in the late 12th century.[3][7][4][5]

Semantic evolution

It followed the history of danger, which first meant “power, domination” and then “refusal, difficulty”: in the Roman de la Rose dangereus means hard to please, standoffish, and Anglo-Norman dangerus “exacting, difficult” (about 1292).[6][2][8] As danger came to mean “peril” (1340), dangereux took the modern sense “presenting a danger” in the 13th century, used of people as well as things.[7][5][6] Montaigne writes C'est une dangereuse invention que celle des gehennes “torture is a dangerous invention”.[2]

Timeline

  • 1060 – Medieval Latin nickname Dangerosa.[3]
  • early 13th century – Dangereus, Reclus de Molliens.[3]
  • 13th century – “Hard to please”, Roman de la Rose.[2]
  • 13th century – “Presenting a danger”.[5]

Meanings

Adjective

  1. dangerous, perilous: un virage dangereux, une maladie dangereuse, un sport dangereux.[9][1]
  2. Harmful, likely to do wrong (of a person): un individu dangereux.[5][9]
  3. (figurative) Risky, delicate: un terrain dangereux.[9]

References

  1. ^ a b c d e f Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d Littré, Émile (1873–1877), Dictionnaire de la langue française, 4 vols. and supplement, Paris: Hachette
  3. ^ a b c d e Trésor de la langue française informatisé (2004), ATILF – CNRS & Université de Lorraine, atilf.fr/tlfi; electronic version of Imbs, Paul; Quemada, Bernard, eds. (1971–1994), Trésor de la langue française, Paris: CNRS / Gallimard
  4. ^ a b Rey, Alain, ed. (2005), Le Grand Robert de la langue française, electronic version, Paris: Le Robert
  5. ^ a b c d e Guilbert, Louis; Lagane, René; Niobey, Georges, eds. (1971–1978; 1989), Grand Larousse de la langue française, Paris: Larousse
  6. ^ a b c d e Bloch, Oscar; Wartburg, Walther von (1989), Dictionnaire étymologique de la langue française, 8th ed., Paris: Presses universitaires de France
  7. ^ a b c d Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert
  8. ^ Anglo-Norman Dictionary (AND2), Aberystwyth University, anglo-norman.net (2nd ed., 2005–)
  9. ^ a b c Rey-Debove, Josette; Rey, Alain, eds. (2007), Le Petit Robert de la langue française, Paris: Le Robert
Cite this entry

“Dangereux.” Etymologically, 18 Oct. 2026, etymologically.com/fr/dangereux. Accessed 18 Oct. 2026.

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