Etymologically

Etymology and origin of the French word pli

Confidence
Established
Formation
Back-formation
First attested
c. 1130 Gormont et Isembart More words from the 12th century
Ultimate origin
Latin plicō
Etymology tree
inherited borrowed derived
Latin plicō
Italian piegare
Old French ploiier
French plier
French pli
French ployer
Romanian pleca
Spanish llegar
From the same root
English ply ← plicō
Latin applicō ← plicō
Latin complex ← plicō
Latin complicō ← plicō
Latin dēplicō ← plicō
Latin displicō ← plicō
Latin explicō ← plicō
Latin implicō ← plicō
Latin replicō ← plicō
Romanian explica ← plicō
Italian piega ← piegare
English pliers ← ploiier
English plywood ← pli
French déployer ← ployer
Romanian plecare ← pleca

Pronunciation

Forms

pli m (plural plis)[1] Old French plei (about 1130), ploi and pli (early 13th century), Middle French ply (1393).[2][3]

Etymology

It is a back-formation from French plier, the verb that is also ployer.[2][1][4] The Old French noun was ploi, made from the verb ploier, and the modern form was remade after the verb in ⟨-ier⟩.[3][5] Littré likewise treats the old and the new form as one word pronounced in two ways.[6]

Both verbs go back to Old French pleier, from Latin plicō (“to fold”).[7][5] The verb in ⟨-ier⟩ is an analogical variant of the one in ⟨-oyer⟩, formed from the 12th century on the model of verbs such as nier and prier, which had a stressed stem in ⟨-ie-⟩ beside an unstressed one in ⟨-ei-⟩ or ⟨-oi-⟩.[5][7] Littré compares Walloon pleu, Occitan pleg, Spanish pliego and Italian piego.[6]

Earliest recorded meaning

It is first found as plei about 1130 in Gormont et Isembart, for a movable, jointed part of a suit of armour.[2] A 12th-century line quoted by Littré speaks of les deus plois de l'aubert, “the two folds of the hauberk”.[6]

Semantic evolution

The common sense, a part of a flexible material turned back on itself to make a double thickness, appears in 1197 in Hélinant's Vers de la mort, in a figurative phrase, and the spelling pli in the early 13th century.[2] Through the Middle Ages the word also named a fold of the skin (1266), a piece of folded paper serving as an envelope (late 13th century) and the flap of a garment (Villon, 1461).[2] An abstract use grew beside it: mettre en ploi “to set to work, to prepare” (about 1185), a state or disposition of mind (early 13th century), and prendre un ploy “to take up a habit” in Alain Chartier (about 1424).[2]

Robert Estienne records the mark left by folding in 1549.[2][3] Furetière in 1690 has faux pli, a crease where there should be none, and cela ne fait pas un pli, and the dressmaking term pli couché.[2][3] Later uses are the ripple of a flowing cloth (1684), an undulation of the ground (1824), a geological fold (1848) and, by 1807, a trick in card games.[2] The sense “letter, message” is recorded by Larousse in 1874.[2] Mise en plis, a hair set, is in Larousse's 1932 dictionary.[8]

Timeline

  • c. 1130 – Plei names a jointed part of armour in Gormont et Isembart.[2]
  • c. 1185 – Mettre en ploi “to prepare, to set to work”.[2]
  • 1197 – Hélinant uses it of a fold of flexible material.[2]
  • early 13th century – The form pli appears, in Raoul de Houdenc.[2]
  • c. 1424 – Alain Chartier has prendre un ploy “to take up a habit”.[2]
  • 1549 – Robert Estienne records the mark left by a fold.[2][3]
  • 1690 – Furetière gives faux pli and cela ne fait pas un pli.[2][3]
  • 1807 – First record of the sense “trick” at cards.[2]
  • 1848 – Used in geology.[2]
  • 1874 – Larousse records the sense “letter, message”.[2]
  • 1932 – Mise en plis appears in Larousse.[8]

Meanings

Noun

  1. A fold: a part of a flexible material (cloth, paper) turned back on itself to form a double thickness.[9][2]
  2. A pleat in a garment, as in pli plat, pli creux and pli couché.[9][1]
  3. A crease, the mark left by folding;[2][9] faux pli, a crease where there should be none.[2][9]
  4. A fold or wrinkle of the skin.[2]
  5. An envelope, and a letter or message sent in one.[2][1]
  6. A habit: prendre le pli, to get into the habit.[1][2]
  7. (card games) A trick.[1][2]
  8. (geology) A fold in rock strata.[2]
  9. Cela ne fait pas un pli: there is no difficulty about it.[6][2]

Word family

  • plisser

Usage notes

The Grand Robert and the Petit Robert list a separate technical word pli (1950), from the English word ply (“layer”): one of the very thin sheets of wood that are glued together to make contreplaqué.[4][9] Littré notes that in some provinces pli was used for a trick at cards.[6]

References

  1. ^ a b c d e f g Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z 27 28 29 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
  3. ^ a b c d e f Guilbert, Louis; Lagane, René; Niobey, Georges, eds. (1971–1978; 1989), Grand Larousse de la langue française, Paris: Larousse
  4. ^ a b Rey, Alain, ed. (2005), Le Grand Robert de la langue française, electronic version, Paris: Le Robert
  5. ^ a b c Bloch, Oscar; Wartburg, Walther von (1989), Dictionnaire étymologique de la langue française, 8th ed., Paris: Presses universitaires de France
  6. ^ a b c d e Littré, Émile (1873–1877), Dictionnaire de la langue française, 4 vols. and supplement, Paris: Hachette
  7. ^ a b Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert
  8. ^ a b Quemada, Bernard, ed. (1959–2006), Datations et documents lexicographiques (Base historique du vocabulaire français, BHVF), Paris: Klincksieck / CNRS / Champion; ATILF
  9. ^ a b c d e Rey-Debove, Josette; Rey, Alain, eds. (2007), Le Petit Robert de la langue française, Paris: Le Robert
Cite this entry

“Pli.” Etymologically, 14 Nov. 2026, etymologically.com/fr/pli. Accessed 15 Nov. 2026.

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