Etymologically

Etymology and origin of the Spanish word casi

Confidence
Established
Formation
Inherited
First attested
1406–1412 González de Clavijo More words from the 15th century
Inherited from
Latin quasi
Ultimate origin
Latin quasi
Etymology tree
inherited borrowed derived
Latin quam
Latin quasi
Spanish casi
English quasi
Italian quasi
From the same root
Latin antequam ← quam
Latin nēquam ← quam
Latin perquam ← quam
Latin posteāquam ← quam
Latin postquam ← quam
Latin praeterquam ← quam
Latin priusquam ← quam
Latin quamdiū ← quam
Latin quamlibet ← quam
Latin quamprīmum ← quam
Latin quamquam ← quam
Latin quamvīs ← quam
Latin quandō ← quam
Latin tamquam ← quam

Pronunciation

  • /ˈkasi/, [ˈka.si][1]

Etymology

It is inherited from Latin quasi (“as if; about”), in a semi-learned form.[2] Corominas and Wiktionary describe it as taken from Latin.[2][3][4][1] It is semi-learned in the other Romance languages too: Italian quasi, quaise and acais in Portuguese dialects, and even Old Occitan cais and Old Catalan quaix, since a popular Catalan form would have been *ques.[2][5][6] Beside it Spanish has the doublet cuasi: Corominas explains the pair by the word's double pronunciation, unstressed and stressed.[2][1]

Old Spanish said fascas or hascas “almost, as if”, frequent from Berceo to Juan Ruiz.[2] Corominas finds the usual explanations unconvincing and tentatively relates it to Galician agás and Old Galician-Portuguese erga or ergo “except”.[2]

The Latin word is a univerbation of quam (“as, how”) and sī (“if”).[7][1]

Earliest recorded meaning

Corominas dates the first record to 1406–1412, in González de Clavijo.[2][3] The CDH has earlier hits, but the first of them are the personal name Cassi and the place name monte Cassi.[8] Corominas notes that in older texts the word was often used with the Latin sense “as if”.[2] Nebrija's Spanish–Latin Vocabulario (c. 1495) has „Casi adverbio. quasi. prope. propemodum”, and the Amadís (c. 1496) speaks of a head left „casi deshecha”, almost shattered.[9][10]

Semantic evolution

Nebrija also used casi as a preposition rendering Latin circiter “about”.[11] Covarrubias in 1611 defined it as “lacking little to reach or to be something”.[12] The Diccionario de Autoridades recorded the repeated casi casi, which expresses hesitation, with quotations from Quevedo and Cervantes.[13] By 1817 the Academy marked casi contrato as obsolete in favour of cuasi contrato.[14] Domínguez in 1846 added the sense “hardly”, as in casi no se detuvo.[15]

Moliner records the ironic ¡casi nada! and the rejoinder sin casi.[16] In Argentina the saying por casi nadie se muere contrasts what nearly happens with what does.[17] Basque borrowed the word as Basque kasik.[18]

Timeline

  • 1406–1412 – first record, in González de Clavijo.[2][3]
  • 1492 – Nebrija renders Latin ferme, pene and prope as casi.[11]
  • c. 1495 – Nebrija's Vocabulario gives the Latin equivalents quasi, prope and propemodum.[9]
  • 1515 – the first record from the Americas, in Tierra Firme.[19]
  • 1611 – Covarrubias defines the adverb.[12]
  • 1817 – the Academy lists casi que and marks casi contrato as obsolete.[14]
  • 1899 – the Academy's dictionary gives the etymology “Del lat. quasi”.[20]

Meanings

Adverb

  1. almost, nearly: Son casi las diez.[4][1]
  2. Repeated, or followed by que, for emphasis: Casi casi perdemos el tren.[4][16]
  3. (colloquial) Expressing a hesitant preference: Casi prefiero ir andando.[21][16]
  4. ¡casi nada!: ironic, stressing that something is important.[16]

Usage notes

The variant cuasi is still used in popular speech in Spain and the Americas.[2]

References

  1. ^ a b c d e Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j Corominas, Joan; Pascual, José A. (1980–1991), Diccionario crítico etimológico castellano e hispánico, 6 vols., Madrid: Gredos, p. 1, 908
  3. ^ a b c Corominas, Joan (1973), Breve diccionario etimológico de la lengua castellana, 3rd ed., Madrid: Gredos, p. s.v. casi
  4. ^ a b c 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. casi
  5. ^ García de Diego, Vicente (1985), Diccionario etimológico español e hispánico, 2nd ed., Madrid: Espasa-Calpe (1st ed. 1954), p. 5335
  6. ^ Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter, p. s.v. quasi
  7. ^ Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  8. ^ Real Academia Española (2013–), Corpus del Diccionario histórico de la lengua española (CDH), version 3.1, https://apps.rae.es/CNDHE, p. s.v. casi
  9. ^ a b Alonso Pedraz, Martín (1986), Diccionario medieval español: desde las Glosas Emilianenses y Silenses (s. X) hasta el siglo XV, 2 vols., Salamanca: Universidad Pontificia de Salamanca, p. 643
  10. ^ Nebrija, Antonio de (1513), Vocabulario español-latino, Salamanca, ed. Marina Vidal Díez (2007), Biblioteca Virtual Miguel de Cervantes, p. 312
  11. ^ a b Lleal, Coloma (dir.), DICCA-XV: Diccionario del castellano del siglo XV en la Corona de Aragón, Barcelona: Universitat de Barcelona, Grup d'Estudis d'Història de la Llengua (GHCL), https://ghcl.ub.edu/diccaxv, p. s.v. casi
  12. ^ 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. 454
  13. ^ Real Academia Española (1726–1739), Diccionario de la lengua castellana (Diccionario de Autoridades), 6 vols., Madrid: Francisco del Hierro, p. s.v. casi
  14. ^ a b Real Academia Española (1817), Diccionario de la lengua castellana, 5th ed., Madrid: Imprenta Real, p. 186
  15. ^ Domínguez, Ramón Joaquín (1846–1847), Diccionario nacional o gran diccionario clásico de la lengua española, 2 vols., Madrid: Establecimiento Léxico-Tipográfico de R. J. Domínguez, p. 354
  16. ^ a b c d Moliner, María (2007), Diccionario de uso del español, 3rd ed., Madrid: Gredos, p. s.v. casi
  17. ^ Garzón, Tobías (1910), Diccionario argentino, Barcelona: Imprenta Elzeviriana de Borrás y Mestres, p. 101
  18. ^ Segura Munguía, Santiago (2001), Nuevo diccionario etimológico latín-español y de las voces derivadas, Bilbao: Universidad de Deusto, p. 629
  19. ^ 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. casi
  20. ^ Real Academia Española (1899), Diccionario de la lengua castellana, 13th ed., Madrid: Imprenta de los Sres. Hernando y Compañía, p. 206
  21. ^ Battaner Arias, Paz (dir.) (2017), Diccionario general de la lengua española VOX, Barcelona: Larousse Editorial, p. s.v. casi

Related etymologies

Cite this entry

“Casi.” Etymologically, 7 Nov. 2026, etymologically.com/es/casi. Accessed 7 Nov. 2026.

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