Etymologically

Etymology and origin of the Spanish word mosto

Confidence
Established
Formation
Inherited
First attested
1223 Fuero de Alcalá de Henares More words from the 13th century
Inherited from
Latin mustum via Old Spanish
Ultimate origin
Latin mustus
Etymology tree
inherited borrowed derived
Latin mustus
Latin mustum
Italian mosto
Romanian must
Spanish mosto
English must
Derivations
From the same root
Latin musteus ← mustum
Romanian mustos ← mustum

Pronunciation

  • /ˈmosto/, [ˈmos.t̪o][1]

Forms

mosto m (plural mostos)[1]

Etymology

It is inherited from Old Spanish mosto, inherited from Latin mustum (“unfermented grape juice”), the noun use of the neuter of mustus (“fresh, young”).[2][3][4][1][5] The word is common to all the Romance languages: Portuguese mosto, Galician mosto, Catalan most, French moût, Italian mosto and Romanian must.[2][6][7]

Wiktionary and Gómez de Silva derive the adjective from Proto-Indo-European *mus- (“damp”), which would give an original sense “wet”.[1][8] De Vaan names only a derivation from a root “to be cheerful”, which he finds semantically gratuitous, and the DHLF calls the adjective a rustic word without a clear etymology.[9][10]

Earliest recorded meaning

The earliest dated manuscript with the word is the Fuero de Alcalá de Henares of 1223.[11] In the CDH's text of the Fuero de Alcalá (dated c. 1235 there), a man without vineyards who is said to have stolen grapes must pay for them if they are found in a man's house o mosto fecho “or must already made” and he cannot show where he got them.[12] Corominas dates the word to the earliest Spanish texts, Berceo among them.[2][3]

Semantic evolution

The word, in its Latin sense of grape juice before fermentation, has been in general use at all periods.[2][4] Autoridades in 1734 added that it was also used for wine, and recorded mosto agustín, a paste of must cooked with flour and spices, made mainly in La Mancha.[13] The derivative mostaza “mustard”, from about 1400, first named sauces made with ground mustard seed and must, which softened its sharpness, and only later the plant itself.[2][3]

In the Caribbean and Mexico mosto is the foul-smelling residue of sugarcane juice in sugar-making.[4][14][15] Alemany's dictionary of 1917 records Cuban mosto muerto and mosto vivo for mixtures of water and cane honey in the still.[16] In Bolivia and Paraguay it is sugarcane juice, and in Chile it means wine.[14] In brewing it also names wort.[1]

Timeline

  • 1223 – the Fuero de Alcalá de Henares.[11]
  • 1250 – the Moamín prescribes mosto cocho “boiled must” of quinces in a remedy.[17][12]
  • c. 1400 – first record of the derivative mostaza.[2][3]
  • c. 1495 – Nebrija gives Latin mustum and gleucos.[18]
  • 1551 – first record in the Americas, in Santo Domingo.[19]
  • 1611 – Covarrubias defines it as wine pressed in the winepress and not yet fermented.[20]
  • 1734 – Autoridades records mosto agustín.[13]
  • 1917 – Alemany records Cuban mosto muerto and mosto vivo.[16]

Meanings

Noun

  1. must: the juice pressed from grapes (uva) before it ferments into wine (vino).[4][1]
  2. (Caribbean, Mexico) The foul-smelling residue of sugarcane juice (caña de azúcar) in sugar-making.[4][14]
  3. (brewing) wort.[1]
  4. (Bolivia, Paraguay) Sugarcane juice.[14]
  5. (Chile) Wine.[14]

Word family

  • mostaza
  • remosto
  • remostar
  • mostillo
  • enmostar
  • trasmosto
  • mostajo
  • Latin mustum
  • Portuguese mosto
  • French moût

Usage notes

The phrase desliar el mosto means to separate the must from its lees.[4]

References

  1. ^ a b c d e f g Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f Corominas, Joan; Pascual, José A. (1980–1991), Diccionario crítico etimológico castellano e hispánico, 6 vols., Madrid: Gredos, p. 4, 164
  3. ^ a b c d Corominas, Joan (1973), Breve diccionario etimológico de la lengua castellana, 3rd ed., Madrid: Gredos, p. s.v. mosto
  4. ^ a b c d e f 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. mosto
  5. ^ Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  6. ^ Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter, p. 5783
  7. ^ García de Diego, Vicente (1985), Diccionario etimológico español e hispánico, 2nd ed., Madrid: Espasa-Calpe (1st ed. 1954)
  8. ^ Gómez de Silva, Guido (1988), Breve diccionario etimológico de la lengua española, México: Fondo de Cultura Económica / El Colegio de México
  9. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  10. ^ Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert
  11. ^ a b 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
  12. ^ a b Real Academia Española (2013–), Corpus del Diccionario histórico de la lengua española (CDH), version 3.1, https://apps.rae.es/CNDHE
  13. ^ a b Real Academia Española (1726–1739), Diccionario de la lengua castellana (Diccionario de Autoridades), 6 vols., Madrid: Francisco del Hierro, p. 4, 616
  14. ^ a b c d e Asociación de Academias de la Lengua Española (2010), Diccionario de americanismos, Lima: Santillana; online at https://www.asale.org/damer
  15. ^ Academia Puertorriqueña de la Lengua Española; Universidad de Puerto Rico, Tesoro lexicográfico del español de Puerto Rico, https://tesoro.pr
  16. ^ a b Alemany y Bolufer, José (1917), Diccionario de la lengua española, Barcelona: Ramón Sopena
  17. ^ 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)
  18. ^ Nebrija, Antonio de (1513), Vocabulario español-latino, Salamanca, ed. Marina Vidal Díez (2007), Biblioteca Virtual Miguel de Cervantes, p. 383
  19. ^ Boyd-Bowman, Peter (2003), Léxico hispanoamericano 1493–1993, ed. Ray Harris-Northall and John J. Nitti, New York: Hispanic Seminary of Medieval Studies
  20. ^ Covarrubias Orozco, Sebastián de (1611), Tesoro de la lengua castellana o española, Madrid: Luis Sánchez (Biblioteca Wordkers transcription, CC BY 4.0), p. 1150

Related etymologies

Cite this entry

“Mosto.” Etymologically, 14 Nov. 2026, etymologically.com/es/mosto. Accessed 14 Nov. 2026.

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