Etymologically

Etymology and origin of the Spanish word peligroso

Confidence
Probable
Formation
Inherited
First attested
1220–1250 Berceo, Milagros de Nuestra Señora, as perigloso More words from the 13th century
Inherited from
Latin periculosus via Old Spanish
Ultimate origin
Latin perīculum
Etymology tree
inherited borrowed derived
Latin perīculum
Spanish peligro
Italian pericolo
Spanish peligroso
Italian pericoloso
From the same root
Latin perīclitor ← perīculum
Latin perīculōsē ← perīculōsus

Pronunciation

  • /peliˈɡɾoso/, [pe.liˈɣ̞ɾo.so][1]

Forms

peligroso (feminine peligrosa, masculine plural peligrosos, feminine plural peligrosas)[1] Old Spanish had perigloso, periglosa, peligloso and perillosa beside peligroso.[2][3]

Etymology

It continues inherited from Old Spanish perigloso, inherited from Latin perīculōsus (“dangerous”), a semi-learned word like peligro.[1][4][2][5] Corominas lists it among the derivatives of that noun, and Wiktionary allows either analysis: the noun plus the suffix -oso, or a semi-learned borrowing of the Latin adjective.[2][1] The Latin adjective is formed on perīculum (“trial, risk, danger”) with -ōsus.[6][1] The noun comes from the same root as perītus (“experienced”) and experior (“to try”);[2][5] Wiktionary connects it, with doubts, with Proto-Indo-European *perh₃- (“to go through, attempt”).[1]

The modern form arose by metathesis of the liquids.[1] Following Cuervo, Corominas notes that by Grammont's laws this change is explained in the derivatives, the verb peligrar and this adjective, rather than in the noun; he adds that early Castilian disliked the groups ⟨gl⟩ and ⟨cl⟩, which gave perigro, then the modern noun by dissimilation.[2]

The same Latin word is Portuguese perigoso, Galician perigoso, Asturian peligrosu, Catalan perillós, French périlleux (from perilleus), Italian pericoloso and English perilous.[7][8][9][10][1] Old Portuguese had perigoso and perigoosa in the 13th century and peligroso in the 14th.[11]

Earliest recorded meaning

Corominas's first record is perigloso in Berceo's Milagros de Nuestra Señora (317c).[2][5] Cabrera quotes another line of the Milagros: Essa salvo a Peidro enna mar periglosa “she saved Peter on the perilous sea”.[12] In Alfonso X's Lapidario (1250–1279) a stone is found far from settlements in places peligrosos for lack of water and for venomous animals.[13]

Semantic evolution

Nebrija renders the word by Latin periculosus and periclitans.[14] Autoridades defines it as “having risk or able to cause harm”, and figuratively as said of a turbulent, reckless person; it cites Covarrubias for the sense “one who is in danger of death”.[15] That passive sense appears in the Americas: in Puebla in 1572 a pregnant woman with a pain in her side has been muy peligrosa “in great danger”, and in Bogotá in 1588 a man is enfermo y muy peligroso.[16] The Academy kept the figurative sense for people, and the DLE now defines it as a person who may cause harm or commit crimes.[17][4]

Timeline

  • 1220–1250 – perigloso in Berceo's Milagros.[2][5]
  • 1250–1279 – logares peligrosos in Alfonso X's Lapidario.[13]
  • 1272 – the spelling peligroso in Alfonso X's prose (HSMS siglum GE5).[18]
  • 1513 – Nebrija gives Latin periculosus.[14]
  • 1572 – Puebla: muy peligrosa of a sick woman, the first American record.[16]
  • 1726–1739 – Autoridades records the literal and the figurative sense.[15]
  • 1899 – the Academy gives the etymology, Latin periculosus.[19]

Meanings

Adjective

  1. Dangerous, perilous: risky, or able to cause harm: Esa curva es muy peligrosa de noche.[4][1]
  2. Of a person: likely to cause harm or to commit crimes: un preso peligroso.[4][20]
  3. (dated) Of a sick person: in danger, gravely ill.[16][15]

Word family

  • peligrosidad

References

  1. ^ a b c d e f g h i Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g Corominas, Joan; Pascual, José A. (1980–1991), Diccionario crítico etimológico castellano e hispánico, 6 vols., Madrid: Gredos, p. 4, 463
  3. ^ Diccionario del Español Medieval electrónico (DEMel), data publication 2026 (CC BY-SA), Universität Rostock, p. s.v. peligroso
  4. ^ a b c d Real Academia Española; Asociación de Academias de la Lengua Española (2014–), Diccionario de la lengua española, 23rd ed., online version 23.8, https://dle.rae.es, p. s.v. peligroso
  5. ^ a b c d Corominas, Joan (1973), Breve diccionario etimológico de la lengua castellana, 3rd ed., Madrid: Gredos, p. s.v. peligro
  6. ^ Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  7. ^ García de Diego, Vicente (1985), Diccionario etimológico español e hispánico, 2nd ed., Madrid: Espasa-Calpe (1st ed. 1954), p. s.v. periculosus
  8. ^ Academia de la Llingua Asturiana (2000), Diccionariu de la Llingua Asturiana, Uviéu: ALLA; online at https://mas.academiadelallingua.com/diccionariu, p. s.v. peligrosu
  9. ^ Alcover, Antoni M.; Moll, Francesc de B. (1930–1962), Diccionari català-valencià-balear, 10 vols., Palma de Mallorca: Moll, p. s.v. perillós
  10. ^ Segura Munguía, Santiago (2014), Lexicón etimológico y semántico del latín y de las voces actuales que proceden de raíces latinas o griegas, Bilbao: Universidad de Deusto, p. 564
  11. ^ Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. perigoso
  12. ^ Cabrera, Ramón (1837), Diccionario de etimologías de la lengua castellana, 2 vols., Madrid: Imprenta de Marcos Bueno, p. s.v. peligroso
  13. ^ a b Kasten, Lloyd A.; Nitti, John J.; Gago Jover, Francisco (2002–), Diccionario de la prosa castellana del Rey Alfonso X, New York: Hispanic Seminary of Medieval Studies (electronic edition 2024), p. s.v. peligroso
  14. ^ a b Nebrija, Antonio de (1513), Vocabulario español-latino, Salamanca, ed. Marina Vidal Díez (2007), Biblioteca Virtual Miguel de Cervantes, p. 395
  15. ^ a b c Real Academia Española (1726–1739), Diccionario de la lengua castellana (Diccionario de Autoridades), 6 vols., Madrid: Francisco del Hierro, p. 5, 192
  16. ^ a b c Boyd-Bowman, Peter (2003), Léxico hispanoamericano 1493–1993, ed. Ray Harris-Northall and John J. Nitti, New York: Hispanic Seminary of Medieval Studies, p. s.v. peligroso
  17. ^ Real Academia Española (1817), Diccionario de la lengua castellana, 5th ed., Madrid: Imprenta Real, p. 655
  18. ^ Hispanic Seminary of Medieval Studies (2026), Old Spanish Textual Archive (OSTA): semi-paleographic transcriptions of Old Spanish texts, ed. Francisco Gago Jover et al., https://www.hispanicseminary.org, p. s.v. peligroso
  19. ^ Real Academia Española (1899), Diccionario de la lengua castellana, 13th ed., Madrid: Imprenta de los Sres. Hernando y Compañía, p. 759
  20. ^ Moliner, María (2007), Diccionario de uso del español, 3rd ed., Madrid: Gredos, p. s.v. peligroso

Related etymologies

Cite this entry

“Peligroso.” Etymologically, 7 Nov. 2026, etymologically.com/es/peligroso. Accessed 7 Nov. 2026.

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