Etymology and origin of the Spanish word serio
- Confidence
- Established
- Formation
- Borrowing
- First attested
- 1626 Corral More words from the 17th century
- Borrowed from
- Latin serius
- Ultimate origin
- Latin sērius
From the same root
Pronunciation
- /ˈseɾjo/, [ˈse.ɾjo][1]
Forms
serio (feminine seria, masculine plural serios, feminine plural serias, superlative serísimo)[1]
Etymology
It is borrowed from Latin sērius (“weighty, important, serious”), a learned word first recorded in 1626.[2][3][4][1] Corominas finds it neither in Alonso de Palencia, Nebrija, Casas, Oudin or Covarrubias, nor in the vocabulary of Góngora or the Quijote.[2] In classical Latin the adjective was used of things (the neuter plural meant “serious matters”), while sevērus was used of persons and things;[5][6] Spanish applied it to persons as well.[5][6]
The same Latin word was borrowed as Portuguese sério in the 17th century and as Italian serio.[7][8][1]
De Vaan reconstructs Proto-Italic *sērjo- and Proto-Indo-European *seh₁-ro- (“slow, heavy”), and rejects the older comparison with Germanic words for “heavy” such as Old High German swāri, because an initial /sw/ before a long /eː/ would have kept its /w/ in Latin; he suggests that the word may come from sērus (“slow”), through “tiring” and “heavy” to “weighty”.[9] The OLD still compares the Germanic words.[10]
Earliest recorded meaning
Corominas's first record is in Corral, in 1626.[2][3] Autoridades quotes Corral: „Reiraste, huesped discreto, de que una muger trate contigo de tan serios discursos” “you will laugh, wise guest, that a woman should hold such serious talk with you”.[11]
Semantic evolution
The noun seriedad is recorded earlier than the adjective, in Aldana (died 1578).[2][3] Autoridades defines serio as grave and composed in conduct, stern in look or speech, and real and sincere, without deceit or jest.[11] Terreros opposes it to bufón “jesting” (una pieza seria).[12] The Academy's 1843 edition adds “grave, important” (negocio serio, enfermedad seria) and “solemn”,[13] and the 1869 edition the contrast with comic genres (ópera seria against ópera bufa).[14]
Moliner and the DLE add the senses “not laughing, looking worried or displeased”, “reliable, responsible” and, of clothes and colours, “sober”.[15][4] In Puerto Rico serio “grave, dangerous” is taken as an anglicism after serious.[16] Cuba has enseriarse “to become serious”.[2]
Timeline
- before 1578 – the noun seriedad in Aldana.[2]
- 1626 – the first record of serio, in Corral.[2][3]
- 1726–1739 – Autoridades defines it and quotes Corral.[11]
- 1760 – the first records from the Americas, in Bogotá.[17]
- 1843 – the Academy adds “grave, important”.[13]
- 1869 – the Academy adds the contrast in ópera seria.[14]
- 1884 – the Academy's dictionary gives the etymology “Del lat. serius”.[18]
Meanings
Adjective
- serious, grave, composed in conduct; not given to laughing: Su abuelo era un hombre serio y callado.[4][15][1]
- (of an action) Befitting a serious person.[4]
- stern in face, look or speech; looking worried or displeased: Se puso serio al oír la noticia.[4][15]
- Real, sincere, without deceit or joking.[4][1]
- Grave, important: Tuvo un accidente serio.[4][1]
- reliable, responsible: un proveedor serio.[15]
- (of a genre) Opposed to comic or burlesque: ópera seria.[4]
- (of clothes, colours) sober, not showy.[15]
Word family
- seriedad
- seriamente
- enseriar
Related words
Usage notes
En serio means “seriously, without joking” (hablar en serio, tomarse en serio).[4][1] The adjective is not related to seriar “to arrange in series”, which is formed from serie.[1]
References
- ^ a b c d e f g h i Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ 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. 5, 221
- ^ a b c d Corominas, Joan (1973), Breve diccionario etimológico de la lengua castellana, 3rd ed., Madrid: Gredos, p. s.v. serio
- ^ a b c d e f g h i 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. serio
- ^ a b Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
- ^ a b Bénaben, Michel (2000), Dictionnaire étymologique de l'espagnol, Paris: Ellipses, p. s.v. serio
- ^ Cunha, Antônio Geraldo da (2010), Dicionário etimológico da língua portuguesa, 4th ed., Rio de Janeiro: Lexikon, p. 3066
- ^ Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. sério
- ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
- ^ Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
- ^ a b c Real Academia Española (1726–1739), Diccionario de la lengua castellana (Diccionario de Autoridades), 6 vols., Madrid: Francisco del Hierro, p. 6, 96
- ^ Terreros y Pando, Esteban de (1786–1793), Diccionario castellano con las voces de ciencias y artes y sus correspondientes de las tres lenguas francesa, latina e italiana, 4 vols., Madrid: Viuda de Ibarra, p. 3, 475
- ^ a b Real Academia Española (1843), Diccionario de la lengua castellana, 9th ed., Madrid: Imprenta de D. Francisco María Fernández, p. 664
- ^ a b Real Academia Española (1869), Diccionario de la lengua castellana, 11th ed., Madrid: Imprenta de Don Manuel Rivadeneyra, p. 710
- ^ a b c d e Moliner, María (2007), Diccionario de uso del español, 3rd ed., Madrid: Gredos, p. s.v. serio
- ^ Academia Puertorriqueña de la Lengua Española; Universidad de Puerto Rico, Tesoro lexicográfico del español de Puerto Rico, https://tesoro.pr, p. s.v. serio
- ^ 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. serio
- ^ Real Academia Española (1884), Diccionario de la lengua castellana, 12th ed., Madrid: Imprenta de D. Gregorio Hernando (the first Academy edition with etymologies), p. 971
Related etymologies
Cite this entry
“Serio.” Etymologically, 7 Nov. 2026, etymologically.com/es/serio. Accessed 7 Nov. 2026.
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