Etymologically

alternus

Etymology and origin of the Latin word alternus

Confidence
Established
Formation
Derivation
First attested
Ennius
Ultimate origin
Latin (alter)

Pronunciation

  • IPA (Classical): [aɫˈtɛr.nʊs][1]
  • IPA (Ecclesiastical): [alˈtɛr.nus][1]

Forms

alternus (feminine alterna, neuter alternum); first/second-declension adjective[1]

Etymology

It is from alter “the other” with the suffix ⟨-nus⟩.[2][1][3]

Earliest recorded meaning

Köbler's first source is Ennius, whom the OLD cites for alternā vice “in turn”.[4][2] Köbler dates Ennius 204–169 BC.[4]

Semantic evolution

It meant occurring in alternation, alternate, as Caesar's alternating beams and stones in a wall, of conversation spoken by two in turn, as in Virgil, and in Ovid of elegiac verse with its alternating lines.[2][5] Alternā vice or alternīs vicibus meant “alternately, in turn”.[2] It meant successive, moving to and fro, answering, every other, as in Plautus, and mutual, reciprocal, as in Propertius.[2] In Virgil the neuter plural alternīs meant “by turns”.[2]

In Medieval Latin it meant alternate, reciprocal, and in the plural both.[6] It survives in Spanish alterno.[1] English alternate comes from its verb alternāre in the 1510s, and English alternative from Medieval Latin alternātīvus.[3]

Timeline

  • 204–169 BC – Ennius uses alternā vice.[2][4]
  • c. 250–184 BC – Plautus uses it of every other.[2][4]
  • c. 50 BC – Caesar uses it of alternating beams and stones.[5][4]
  • 1510s – English alternate is recorded.[3]

Meanings

Adjective

  1. Alternate, alternating, alternīs, by turns.[2]
  2. Successive.[2]
  3. Moving to and fro; answering.[2]
  4. Every other.[2]
  5. Mutual, reciprocal.[2]

Word family

  • alternō

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 k l m Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  4. ^ a b c d e Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  5. ^ a b Gaffiot, Félix (2016), Dictionnaire latin-français, new ed. by Gérard Gréco et al. (Gaffiot 2016), online ed.
  6. ^ Latham, R. E., D. R. Howlett, R. K. Ashdowne, et al. (1975–2013), Dictionary of Medieval Latin from British Sources, London: British Academy / Oxford University Press
Cite this entry

“Alternus.” Etymologically, 16 Oct. 2026, etymologically.com/la/alternus. Accessed 16 Oct. 2026.

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