Etymologically

Etymology and origin of the Old French word lac

Confidence
Established
Formation
Borrowing
First attested
1100–1150 Cambridge Psalter More words from the 11th century
Borrowed from
Latin lacus
Ultimate origin
Proto-Indo-European *lókus
Etymology tree
inherited borrowed derived
Latin lacus
Italian lago
Romanian lac
Spanish lago
Old French lac
English lake
From the same root
Latin lacūna ← lacus

Forms

lac m (oblique plural las; nominative singular las)[1]

Etymology

It is borrowed from Latin lacus (“tub, basin; lake”).[1][3][4][5] The inherited form of the same Latin word was lai, which had little vitality and was displaced by the borrowing.[3][6][5] The FEW and the TLFi allow that the sense “pit” may also have come north from Old Occitan lac.[5][7]

The Latin word continues Proto-Italic *laku- and Proto-Indo-European *lok-u- (“lake”), whose cognates include Old Irish loch, Ancient Greek λάκκος (lákkos, “pond”) and Old English lagu.[8] Its Romance continuations include Italian lago, Spanish lago and Romanian lac.[9] Wiktionary adds that early Middle English lac may have helped it displace the inherited form.[1]

Earliest recorded meaning

The first record is the Cambridge Psalter, an Anglo-Norman interlinear translation of the first half of the 12th century, where the word means a pit.[5][10][11] Bloch–Wartburg and the DHLF date it about 1120, and the DHLF ascribes the sense “pit” to Christian Latin.[3][4]

Semantic evolution

The sense “lake” is recorded from Chrétien de Troyes's Erec et Enide, 1165–1170, which names Lanceloz del Lac.[5][12] The sense “pit” lasted into the 14th century, in Guillaume de Machaut's lac aus lyons, the lions' den of Daniel.[5][13] The AND also records the pit of Hell and a wine-vat or wine-press, perhaps from a misreading of lacus in Revelation.[2] The word survives as French lac.[5]

Timeline

  • 1100–1150 – lac “pit” in the Cambridge Psalter.[5][10][11]
  • c. 1120 – the date Bloch–Wartburg and the DHLF give.[3][4]
  • 1165–1170 – “lake” in Chrétien de Troyes's Erec et Enide.[5][14]
  • c. 1225 – lac in the prose Queste del saint Graal.[15]

Meanings

Noun

  1. a lake, body of water.[2][16][1]
  2. a pit, hole, den; the pit of Hell.[2][13][1]
  3. a ditch, trench.[1]
  4. a wine-vat or winepress.[2]

Anglo-Norman

The AND heads the word lac, first cites it from the first half of the 12th century, and lists lach, lak and lake.[2] It has a separate article for the inherited lai in the same senses, first cited in the third quarter of the century.[17] Middle English lake continues Old English lacu and was reinforced by Latin and by the Old French word.[18][19]

Descendants

  • Middle French lac (→ French lac)[1][5]
  • Norman lac[1]
  • Middle English lake (partly borrowed; → English lake)[18][19]
  • lai

Usage notes

Tobler–Lommatzsch, the AND, the DÉCT and Godefroy all head the word lac.[16][2] The spelling lac also stands for a word for “milk”, from Latin lac.[1]

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 g Anglo-Norman Dictionary (AND2), Aberystwyth University, anglo-norman.net (2nd ed., 2005–), p. s.v. lac
  3. ^ a b c d Bloch, Oscar; Wartburg, Walther von (1989), Dictionnaire étymologique de la langue française, 8th ed., Paris: Presses universitaires de France, p. 397
  4. ^ a b c Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert, p. s.v. lac
  5. ^ a b c d e f g h i j Trésor de la langue française informatisé (2004), ATILF – CNRS & Université de Lorraine, atilf.fr/tlfi; electronic version of Imbs, Paul; Quemada, Bernard, eds. (1971–1994), Trésor de la langue française, Paris: CNRS / Gallimard
  6. ^ Gamillscheg, Ernst (1966–1969), Etymologisches Wörterbuch der französischen Sprache, 2nd, fully revised ed., Heidelberg: Winter, p. 586
  7. ^ Wartburg, Walther von, et al. (1922–2002), Französisches Etymologisches Wörterbuch, 25 vols., Bonn / Leipzig / Basel: Klopp / Teubner / Zbinden, p. 5:126
  8. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill, p. s.v. lacus
  9. ^ Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter, p. 4836
  10. ^ a b Möhren, Frankwalt, Dictionnaire étymologique de l'ancien français (DEAF): Complément bibliographique, electronic version (DEAFBiblEl), Heidelberger Akademie der Wissenschaften, alma.hadw-bw.de/deafbibl (texts by siglum, with their dates), p. PsCambrM
  11. ^ a b Stein, Achim; Kunstmann, Pierre; Gleßgen, Martin-D., eds., Nouveau Corpus d'Amsterdam, version 4 (lemmatised corpus of Old French texts, after A. Dees), Universität Stuttgart, github.com/michaniets/NCA (texts by DEAF siglum), p. PsCambrM
  12. ^ Godefroy, Frédéric (1881–1902), Dictionnaire de l'ancienne langue française et de tous ses dialectes du IXe au XVe siècle, 10 vols., Paris: Vieweg / Bouillon, p. 10:58
  13. ^ a b Godefroy, Frédéric (1881–1902), Dictionnaire de l'ancienne langue française et de tous ses dialectes du IXe au XVe siècle, 10 vols., Paris: Vieweg / Bouillon, p. 4:689
  14. ^ Möhren, Frankwalt, Dictionnaire étymologique de l'ancien français (DEAF): Complément bibliographique, electronic version (DEAFBiblEl), Heidelberger Akademie der Wissenschaften, alma.hadw-bw.de/deafbibl (texts by siglum, with their dates), p. ErecF
  15. ^ UD Old French PROFITEROLE and UD Middle French PROFITEROLE treebanks, Universal Dependencies (from the SRCMF and the Base de français médiéval; texts by DEAF siglum), p. Graal_1225_prose
  16. ^ a b Tobler, Adolf; Lommatzsch, Erhard (1925–2002), Altfranzösisches Wörterbuch, 11 vols., Berlin / Wiesbaden / Stuttgart: Weidmann / Steiner, p. 5:32
  17. ^ Anglo-Norman Dictionary (AND2), Aberystwyth University, anglo-norman.net (2nd ed., 2005–), p. s.v. lai
  18. ^ a b Kurath, Hans; Kuhn, Sherman M.; Lewis, Robert E., eds. (1952–2001), Middle English Dictionary, Ann Arbor: University of Michigan Press; online edition ed. Frances McSparran et al. (2000–2018)
  19. ^ a b Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com

Related etymologies

Cite this entry

“Lac.” Etymologically, 13 Nov. 2026, etymologically.com/fro/lac. Accessed 13 Nov. 2026.

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