Etymologically

Etymology and origin of the Spanish word primo

Confidence
Established
Formation
Inherited
First attested
c. 1140 Cantar de mio Cid More words from the 12th century
Inherited from
Latin primus
Ultimate origin
Latin prīmus
Etymology tree
inherited borrowed derived
Latin prīmus
Italian primo
Spanish primo
From the same root
Latin imprīmīs ← prīmus
Latin prīmaevus ← prīmus
Latin prīmārius ← prīmus
Latin prīmipīlus ← prīmus
Latin prīmitiae ← prīmus
Latin prīmitus ← prīmus
Latin prīmō ← prīmus
Latin prīmōrdium ← prīmus
Latin primoris ← prīmus
Latin prīmum ← prīmus
Latin prīnceps ← prīmus

Pronunciation

  • /ˈpɾimo/, [ˈpɾi.mo][1]

Forms

primo m (plural primos, feminine prima, feminine plural primas)[1]

Etymology

It is inherited from Latin prīmus (“first”), which figuratively came to mean “of the first quality”.[2][3][4] In the sense “cousin” it is a shortening of cōnsobrīnus prīmus (“first cousin”), literally “first cousin” as against the second and third cousins, to whom the word was later extended.[2][3][5] Latin cōnsobrīnus alone meant rather a second cousin or a more distant relative, so the longer phrase was needed and was later worn down.[2][6] Castilian kept the Latin word for cousin itself as sobrino “nephew”.[7][3]

In the proper sense “first” Spanish replaced the Latin word with primero from the start;[2] the Spanish word in that sense, from the Glosas Silenses to Juan Ruiz, is a Latinism.[2] Wiktionary accordingly treats the adjective “first, prime” as a borrowing from Latin.[1]

The Latin adjective goes back to Proto-Italic *prīzmos, a superlative of an obsolete preposition *pri (“before”); de Vaan builds it on an adverb of that form with the superlative suffix *-isamo-, and calls the PIE ancestry of this adverb uncertain.[1][8]

The cousin sense is an innovation of Portuguese primo and Spanish.[2] Elsewhere the Latin adjective gave Catalan prim (“thin, fine”), Occitan prim and Italian primo, while French cousin, Catalan cosí and Italian cugino continue the Latin word for cousin.[7][2] Corominas rejects the usual explanation of the French type as a nursery shortening and derives it from a contraction of the Latin phrase, as in southern Italian dialects.[2]

Earliest recorded meaning

Both main senses are in the Cantar de mio Cid (c. 1140): un brial primo de ciclaton, “a fine tunic of silk”, and primo eres de mis fijas, “you are my daughters' cousin”.[9][2][3] The cousin sense also appears in a charter of 1194.[2]

Semantic evolution

The old adjective meant “excellent, fine”, and also “scrupulous, subtle”;[2] Aragonese used it for fine as opposed to coarse cloth (tela prima, 1373 and 1497), the sense that became Catalan prim “thin”.[2] Covarrubias in 1611 called a shoemaker de obra prima one who makes fine shoes.[10] The Diccionario de Autoridades (1737) gives primo as “first”, as “excellent, skilful”, and as the son of an uncle, with primo hermano, segundo, tercero.[11]

In 1884 the Academy added the title the king gave to the grandees of Spain and the colloquial sense of a simple, gullible person.[12] Corominas takes the latter from the old sense “subtle, refined”, used ironically: in Cuba primo meant a simple rustic (le cogí de primo). The colloquial “the one who pays for others, the dupe” comes from this Cuban use.[2][3] Wagner preferred a figurative use of the kinship word, the country cousin whom everyone exploits.[2][3] Número primo is the mathematician's prime number.[13][1] In Spain primo is also a slang form of address among young men, and in several countries of Central and South America it means simply a man or woman, or a close friend.[1][14]

Timeline

  • c. 1140 – the Cantar de mio Cid uses primo for “excellent” and for “cousin”.[9][2]
  • 1194 – the cousin sense in a charter.[2]
  • 1272–1275 – Alfonso X's General estoria calls the children of two brothers primo.[15]
  • 1373 – tela prima “fine cloth” in an Aragonese inventory.[2]
  • 1529 – the first record of the cousin sense in the Americas, in Nicaragua.[16]
  • 1611 – Covarrubias records obra prima for fine workmanship.[10]
  • 1737 – the Diccionario de Autoridades records primo hermano.[11]
  • 1884 – the Academy records the gullible person and the king's title for the grandees.[12]

Meanings

Noun

  1. cousin: the son of one's uncle or aunt;[4][1][5] primo hermano or primo carnal a first cousin, primo segundo a second cousin: Pasé el verano con mis primos de Burgos.[4][1][5]
  2. (historical) The title the king gave to the grandees of Spain in letters and official documents.[4]
  3. (colloquial) A sucker, a gullible person who is easily deceived or exploited: hacer el primo.[4][1][13]
  4. (Spain, slang) A form of address among friends, like “mate” or “bro”.[1]
  5. (mathematics) A prime number (número primo).[1][13]

Adjective

  1. first, now chiefly in set phrases such as materia prima “raw material”.[4][1][17]
  2. (obsolete) Exquisite, excellent, finely made.[4][11]
  3. (mathematics) Of a number: prime, divisible only by itself and one.[1][13]

Word family

  • primor
  • primazgo
  • primo hermano
  • primo segundo

Usage notes

Prima is both the feminine of primo and a noun of its own: a bonus or premium, the treble string of a guitar, and the canonical hour of prime.[4][3] Primo hermano is also said of things that closely resemble each other.[5]

References

  1. ^ a b c d e f g h i j k l m Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m n o p q Corominas, Joan; Pascual, José A. (1980–1991), Diccionario crítico etimológico castellano e hispánico, 6 vols., Madrid: Gredos, p. 4, 648
  3. ^ a b c d e f g Corominas, Joan (1973), Breve diccionario etimológico de la lengua castellana, 3rd ed., Madrid: Gredos, p. s.v. primo
  4. ^ a b c d e f g h 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. primo
  5. ^ a b c d Moliner, María (2007), Diccionario de uso del español, 3rd ed., Madrid: Gredos, p. s.v. primo
  6. ^ Segura Munguía, Santiago (2001), Nuevo diccionario etimológico latín-español y de las voces derivadas, Bilbao: Universidad de Deusto, p. 159
  7. ^ a b Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter
  8. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  9. ^ a b Menéndez Pidal, Ramón (1908–1911), Cantar de Mio Cid: texto, gramática y vocabulario, 3 vols., Madrid: Bailly-Baillière, p. s.v. primo
  10. ^ a b Covarrubias Orozco, Sebastián de (1611), Tesoro de la lengua castellana o española, Madrid: Luis Sánchez (Biblioteca Wordkers transcription, CC BY 4.0), p. 1229
  11. ^ a b c Real Academia Española (1726–1739), Diccionario de la lengua castellana (Diccionario de Autoridades), 6 vols., Madrid: Francisco del Hierro, p. 5, 379
  12. ^ a b Real Academia Española (1884), Diccionario de la lengua castellana, 12th ed., Madrid: Imprenta de D. Gregorio Hernando (the first Academy edition with etymologies), p. 864
  13. ^ a b c d 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. 612
  14. ^ Asociación de Academias de la Lengua Española (2010), Diccionario de americanismos, Lima: Santillana; online at https://www.asale.org/damer, p. s.v. primo
  15. ^ 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. primo
  16. ^ 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. primo
  17. ^ Bénaben, Michel (2000), Dictionnaire étymologique de l'espagnol, Paris: Ellipses, p. s.v. primo

Related etymologies

Cite this entry

“Primo.” Etymologically, 7 Nov. 2026, etymologically.com/es/primo. Accessed 7 Nov. 2026.

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