Etymologically

Etymology and origin of the Spanish word igual

Confidence
Established
Formation
Inherited
First attested
1100 a charter in Oelschläger's list, spelt equal More words from the 11th century
Inherited from
Latin aequalis via Old Spanish
Ultimate origin
Latin aequus
Etymology tree
inherited borrowed derived
Latin aequus
Latin aequālis
Italian uguale
Spanish igual
English equal
French égal
From the same root
Latin aequaevus ← aequus
Latin aequanimitās ← aequus
Latin aequanimus ← aequus
Latin aequē ← aequus
Latin aequinoctium ← aequus
Latin aequitās ← aequus
Latin aequiter ← aequus
Latin aequivaleō ← aequus
Latin aequō ← aequus
Latin aequor ← aequus
Latin aequum ← aequus
Latin inīquus ← aequus
English unequal ← aequālis
Latin aequālitās ← aequālis
Latin aequāliter ← aequālis
Latin inaequālis ← aequālis
French également ← égal

Pronunciation

  • /iˈɡwal/, [iˈɣ̞wal][1]

Forms

igual m or f (masculine and feminine plural iguales)[1]

Etymology

It is inherited from Old Spanish egual, inherited from Latin aequālis (“of the same size or age; equal”), from aequus (“flat, smooth, even; equal”).[2][3][4][1] egual is Berceo's usual form, but igual already occurs in some early manuscripts of his works and in 13th-century manuscripts of Alfonso X's astronomy.[2] egual stayed in common use in the 14th and 15th centuries, in Juan Ruiz and the Rimado de Palacio, and the form with i- became general from Nebrija on.[2] Old Spanish also had the verb eguar (“to make equal”), from aequāre.[2]

The same word is Portuguese igual, Catalan igual, Occitan egal, French égal and Italian uguale, beside Old French ivel.[5][1] Meyer-Lübke took Catalan igual for a Castilianism, while Corominas sees no reason for it.[5][2] In his Catalan dictionary he notes that the Catalan form was avoided as vulgar in the Middle Ages, beside egual, and became widespread from about 1480.[6] Judeo-Spanish has Ladino algal.[7]

Earliest recorded meaning

Corominas finds the word first as equal in a charter of 1100 from Oelschläger's list.[8] Berceo has both egual and igual.[2][3] The earliest CDH hit is the Razón de amor (c. 1205–1250), describing a woman's nose: „naryz egual & dereyta” “a nose even and straight”.[9] The Semejanza del mundo (c. 1223) has the i-form, of a sphere „toda ygual e rredonda” “all even and round”.[9]

Semantic evolution

Alfonso X's prose already uses the word for “equal in nature or quantity”, “level, smooth” and “constant, unchanging”, and as a noun for a person's equals.[10] Covarrubias in 1611 recorded the proverb cada qual case con su igual “let everyone marry his equal”, and a use of igual for “better”.[8] Autoridades defined it as matching another thing in quantity, quality or size, and also as “level, without slopes”.[11] The 1884 edition added the equals sign of mathematics and the phrases al igual and de igual a igual.[12]

The adverb “in the same way” is recorded in Venezuela in 1578: „la cebada igual” “and barley likewise”.[13] Modern colloquial Spanish also uses igual for “perhaps”, and the sense “even so, anyway” is common in much of Latin America.[4][14]

Timeline

  • 1100 – the spelling equal in a charter.[2][3]
  • c. 1205–1250 – the Razón de amor has egual “even”.[9]
  • c. 1223 – the Semejanza del mundo has the form ygual.[9]
  • 1228–1246 – Berceo uses egual and occasionally igual.[2][9]
  • 1250–1279 – Alfonso X's Lapidario uses egual for “level, smooth”.[10]
  • c. 1495 – from Nebrija on, igual replaces egual.[2]
  • 1578 – the adverb “likewise”, in Venezuela.[13]
  • 1611 – Covarrubias records cada qual case con su igual.[8]
  • 1884 – the Academy's dictionary adds the equals sign.[12]

Meanings

Adjective

  1. equal, the same in some or every respect.[4][1]
  2. Of a surface, level or even: un camino igual.[4][1]
  3. Very like, similar: Nunca he oído nada igual.[4]
  4. Proportionate, in due relation.[4]
  5. constant, unchanging: un carácter siempre igual.[4]
  6. Of the same value or worth: A ella le da igual.[4]
  7. (geometry) Of a figure, able to be superimposed on another so that they coincide.[4]

Noun

  1. A person of the same class or condition, an equal: Lo trató como a un igual.[4][1]
  2. (mathematics) The equals sign (=).[4][1]

Adverb

  1. In the same way, just like.[4][1]
  2. Even so, anyway: Aunque haga frío, igual vamos a la playa.[4][1][14]
  3. (colloquial) Perhaps, maybe.[4]

Word family

  • igualar
  • iguala
  • igualdad
  • igualado
  • igualmente
  • desigual
  • igualitario
  • ecuador
  • equi-
  • equilibrio
  • equivalente
  • ecuación
  • equidad
  • adecuar
  • inicuo
  • Latin aequālis
  • Portuguese igual

Usage notes

Fixed phrases include al igual que “just as” and sin igual “unequalled”.[4][11]

References

  1. ^ a b c d e f g h i j Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i Corominas, Joan; Pascual, José A. (1980–1991), Diccionario crítico etimológico castellano e hispánico, 6 vols., Madrid: Gredos, p. 3, 438
  3. ^ a b c Corominas, Joan (1973), Breve diccionario etimológico de la lengua castellana, 3rd ed., Madrid: Gredos, p. s.v. igual
  4. ^ a b c d e f g h i j k l m n o 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. igual
  5. ^ a b Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter, p. s.v. aequalis
  6. ^ Coromines, Joan (1980–2001), Diccionari etimològic i complementari de la llengua catalana, 10 vols., Barcelona: Curial / La Caixa (online ed., Institut d'Estudis Catalans 2024), p. 4, 830
  7. ^ García de Diego, Vicente (1985), Diccionario etimológico español e hispánico, 2nd ed., Madrid: Espasa-Calpe (1st ed. 1954), p. art. 223
  8. ^ a b c Covarrubias Orozco, Sebastián de (1611), Tesoro de la lengua castellana o española, Madrid: Luis Sánchez (Biblioteca Wordkers transcription, CC BY 4.0), p. 1036
  9. ^ a b c d e Real Academia Española (2013–), Corpus del Diccionario histórico de la lengua española (CDH), version 3.1, https://apps.rae.es/CNDHE, p. s.v. igual
  10. ^ 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. igual
  11. ^ a b Real Academia Española (1726–1739), Diccionario de la lengua castellana (Diccionario de Autoridades), 6 vols., Madrid: Francisco del Hierro, p. 4, 208
  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. 584
  13. ^ a b 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. igual
  14. ^ a b Asociación de Academias de la Lengua Española (2010), Diccionario de americanismos, Lima: Santillana; online at https://www.asale.org/damer, p. s.v. igual

Related etymologies

Cite this entry

“Igual.” Etymologically, 7 Nov. 2026, etymologically.com/es/igual. Accessed 7 Nov. 2026.

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