Etymologically

aequor

Etymology and origin of the Latin word aequor

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

Pronunciation

  • IPA (Classical): [ˈae̯.kʷɔr][1]
  • IPA (Ecclesiastical): [ˈɛː.kʷor][1]

Forms

aequor n (genitive aequoris); third declension[1] Varro has the spelling aecor.[2]

Etymology

It is from aequus “level, flat”.[2][3][1] De Vaan reconstructs ⟨aequus⟩ as probably ⟨*aikwos⟩, without a convincing etymology.[4] Wiktionary suggests that the shift to “sea” may have been helped by the unrelated aqua.[1]

Earliest recorded meaning

Köbler's earliest source is Ennius, and the OLD's earliest citation is Accius, of a level surface.[5][2] Köbler dates Ennius 204–169 BC and Accius 170–c. 90 BC.[5]

Semantic evolution

It meant any smooth or level surface; a level stretch of ground, a plain, as in Varro and Cicero; above all in poetry the sea, especially as calm and flat; and in Ovid the waters of a river.[2][6] Lewis & Short note that it is mostly poetic, found only once in Cicero and once in Sallust.[7]

In Ecclesiastical Latin it means the sea.[8] British Medieval Latin used it for a plain and the sea.[9]

Timeline

  • 204–169 BC – Ennius uses it.[5]
  • 170–c. 90 BC – Accius uses it of a level surface.[2][5]
  • 116–27 BC – Varro uses it of a plain and of the sea.[2][5]
  • 43 BC–18 AD – Ovid uses it of a river.[2][5]

Meanings

Noun

  1. A level surface, expanse.[2]
  2. A plain.[2][6]
  3. (chiefly poetic) The sea.[2][8]
  4. The waters of a river.[2]

Word family

  • aequoreus

Usage notes

Isidore of Seville derived aequor from aqua and also explained it as the sea that settles level again after storms.[10]

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 Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  4. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  5. ^ a b c d e f Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  6. ^ a b Gaffiot, Félix (2016), Dictionnaire latin-français, new ed. by Gérard Gréco et al. (Gaffiot 2016), online ed.
  7. ^ Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  8. ^ a b Stelten, Leo F. (1995), Dictionary of Ecclesiastical Latin, Peabody, Mass.: Hendrickson
  9. ^ 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
  10. ^ Isidore of Seville, Etymologiarum sive Originum libri XX, ed. W. M. Lindsay (Oxford, 1911).
Cite this entry

“Aequor.” Etymologically, 17 Oct. 2026, etymologically.com/la/aequor. Accessed 17 Oct. 2026.

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