Etymologically

alius

Etymology and origin of the Latin word alius

Confidence
Established
Formation
Inherited
First attested
Livius Andronicus
Inherited from
Proto-Italic *al-jo-
Ultimate origin
Proto-Indo-European (*h₂el-io-)
Etymology tree
inherited borrowed derived
Latin alius
Latin alibi
English alibi

Pronunciation

  • IPA (Classical): [ˈa.li.ʊs][1]
  • IPA (Ecclesiastical): [ˈaː.li.us][1]

Forms

alius (feminine alia, neuter aliud); first/second-declension determiner (pronominal declension or non-pronominal declension)[1]

Etymology

It is inherited from Proto-Italic *al-jo- (“another”), inherited from Proto-Indo-European *h₂el-io- (“another”).[2] Wiktionary traces the PIE word to a root Proto-Indo-European *h₂el- (“beyond, other”).[1] The neuter alid for aliud in Catullus is explained by de Vaan as a shortened form or as modelled on quid and id.[2]

Cognate with Oscan allo, Umbrian arsir, Old Irish aile (“other”), Ancient Greek ἄλλος (állos, “other”), Old Armenian այլ (ayl) and Gothic 𐌰𐌻𐌾𐌹𐍃 (aljis, “other”).[2] Its Proto-Germanic relative *aljaz gave English else.[1]

Earliest recorded meaning

It is found from Livius Andronicus onwards.[2] Köbler's first source is Naevius (c. 235–200 BC).[3] In Plautus a woman says she abandoned a baby and “another woman” picked it up.[4]

Semantic evolution

Its basic sense was “different in identity, other”, and repeated it marked contrasts, as alius … alius, “one … another”.[4] It also meant an additional one, alius atque alius “one after another”, the rest of something, and something strange or new, as Cicero's “other ceremonies, other priests”.[4] Used as a pronoun it meant another person or thing, and in the neuter something else, as Terence's “I fear I may believe one thing and report another”.[4]

Latin used alius of more than two and alter of two, with some exceptions.[5][6] Its derivatives include aliēnus “belonging to others”, aliquis “someone” and alter “the other”.[2] English alien comes from aliēnus through Old French.[7]

Timeline

  • 280/260–before 200 BC – Livius Andronicus uses it.[2][3]
  • c. 235–200 BC – Naevius uses it.[3]
  • c. 250–184 BC – Plautus uses it of “another woman” and of other persons.[4][3]
  • 190–159 BC – Terence contrasts aliud with aliud, one thing with another.[4][3]
  • c. 1300 – English alien comes from its derivative aliēnus.[7]

Meanings

Determiner

  1. Other, different (in identity).[4][1]
  2. (repeated) alius … alius: one … another; some … others.[4][1]
  3. Additional, further, another.[4]
  4. alius atque alius: one after another, more and more.[4]
  5. The rest of, the other.[4]
  6. Strange, new, different from the familiar.[4][1]
  7. (as a pronoun) Another person, (neuter) something else.[4][1]
  8. (Medieval Latin) Second, alius ab, different from.[8]

Word family

  • abaliud
  • alibī
  • aliēnus
  • aliōquī
  • aliōrsum
  • aliquantus
  • aliquī
  • aliquis
  • aliquot
  • aliubī
  • aliunde
  • aliquilibet
  • hic
  • is
  • quisque
  • quispiam
  • eiusmodī
  • eiusdemmodī
  • cuiusmodī
  • cuiusmodīcumque
  • cuiusvīsmodī
  • cuiusquemodī
  • alter
  • English alien
  • English else

Usage notes

Georges and Gaffiot note that alius refers to one of several, while alter is used of one of two.[5][6]

References

  1. ^ a b c d e f g h i Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  3. ^ a b c d e Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  4. ^ a b c d e f g h i j k l m Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  5. ^ a b Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  6. ^ a b Gaffiot, Félix (2016), Dictionnaire latin-français, new ed. by Gérard Gréco et al. (Gaffiot 2016), online ed.
  7. ^ a b Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  8. ^ Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill

Derived terms

Related etymologies

  • opus · also from Proto-Indo-European
  • albus · also from Proto-Indo-European
  • potis · also from Proto-Indo-European
  • salvus · also from Proto-Indo-European
  • socius · also from Proto-Indo-European
  • signum · also from Proto-Indo-European
  • frater · also from Proto-Indo-European
  • foedus · also from Proto-Indo-European
Cite this entry

“Alius.” Etymologically, 15 Oct. 2026, etymologically.com/la/alius. Accessed 15 Oct. 2026.

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