Etymologically

Etymology and origin of the French word sien

Confidence
Established
Formation
Inherited
First attested
842 Strasbourg Oaths More words from the 9th century
Inherited from
Latin suus via Old French
Ultimate origin
Latin suus
Etymology tree
inherited borrowed derived
Latin suus
French sien
French son
Italian suo
Spanish su
Spanish suyo

Pronunciation

Forms

sien (feminine sienne, masculine plural siens, feminine plural siennes)[1] Old French suon, soen, suen, plural and subject suens.[2][3][4] Old French feminine soue, soie, seie, and in Picard sieue.[2][4]

Etymology

It is inherited from Old French suen, inherited from Latin suus (“his, her, their own”), through its stressed accusative ⟨suum⟩.[2][3][5][4][6] The TLFi traces ⟨suum⟩ to the Old French form by a differentiation of the two vowels, then diphthongisation and loss of the final ⟨u⟩.[4] The form with ⟨ie⟩ (about 1165) was remade after mien.[2][5][4]

The feminine is analogical too: it replaced Old French soue, from the stressed accusative ⟨suam⟩, with the variants soie (about 1180), formed after moie, and seie (1214).[2][3][4] The Picard sieue followed mieue.[4] Rey traces the Latin word to an Indo-European root Proto-Indo-European *swe- marking that a person belongs to a group or stands apart, also seen, extended, in Ancient Greek ἔθος (éthos, “custom”) and ἔθνος (éthnos, “people”).[2]

Earliest recorded meaning

The oldest record is the oblique feminine suo in the Strasbourg Oaths (842), in de suo part “on his part”.[4][5][3] The Sequence of St Eulalia (881) has Par souue clementia “by his mercy”.[4]

Semantic evolution

As an adjective beside a noun, “his, her own”, the word has been literary since the late 12th century.[2][5] Old French also used it on its own, as in maugré suen “against his will” (1176, Chrétien de Troyes).[4] As a noun, le sien meant “his property” (1130), a sense now kept only in y mettre du sien (1696) “to do one's part, show goodwill”.[2] The plural les siens (about 1240) means one's family, friends or supporters, and faire des siennes (1558) “to play one's usual tricks”.[2] The pronoun of possession le sien is found in Boileau in 1669.[2]

Timeline

  • 842 – Suo in the Strasbourg Oaths.[4][3]
  • 881 – Souue in the Sequence of St Eulalia.[4]
  • 1080 – Soen in the Chanson de Roland.[2][5][7]
  • 1130 – Le sien “his property”.[2]
  • c. 1165 – Sien, remade after mien, in Benoît de Sainte-Maure's Roman de Troie.[4][2]
  • c. 1240 – Les siens “one's family and followers”.[2]
  • c. 1260 – The feminine sienne in the Récits d'un ménestrel de Reims.[4]
  • 1558 – Faire des siennes.[2]
  • 1696 – Y mettre du sien.[2]

Meanings

Pronoun

  1. Le sien, la sienne, les siens, les siennes: his, hers, its (one): Ta voiture est plus rapide que la sienne.[8][9][4]

Adjective

  1. (literary) His or her own: faire siennes les idées de quelqu'un, to adopt them as one's own.[9][8][1]

Noun

  1. Y mettre du sien: to do one's share, show goodwill.[8][2]
  2. Les siens: one's family, friends or supporters.[8][2]
  3. (familiar) Faire des siennes: to get up to one's usual tricks.[8][2]

Usage notes

Littré notes that the ⟨n⟩ is sounded in liaison only when sien comes before its noun, as in un sien ami.[7]

References

  1. ^ a b c 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 Rey, Alain, ed. (1992), Dictionnaire historique de la langue française, Paris: Le Robert
  3. ^ a b c d e Rey, Alain, ed. (2005), Le Grand Robert de la langue française, electronic version, Paris: Le Robert
  4. ^ a b c d e f g h i j k l m n o 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
  5. ^ a b c d e Guilbert, Louis; Lagane, René; Niobey, Georges, eds. (1971–1978; 1989), Grand Larousse de la langue française, Paris: Larousse
  6. ^ Wartburg, Walther von, et al. (1922–2002), Französisches Etymologisches Wörterbuch, 25 vols., Bonn / Leipzig / Basel: Klopp / Teubner / Zbinden, p. 12, 481b
  7. ^ a b Littré, Émile (1873–1877), Dictionnaire de la langue française, 4 vols. and supplement, Paris: Hachette
  8. ^ a b c d e Dictionnaire Le Robert en ligne, dictionnaire.lerobert.com (accessed 2024)
  9. ^ a b Rey-Debove, Josette; Rey, Alain, eds. (2007), Le Petit Robert de la langue française, Paris: Le Robert

Related etymologies

Cite this entry

“Sien.” Etymologically, 14 Nov. 2026, etymologically.com/fr/sien. Accessed 15 Nov. 2026.

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