Etymologically

Etymology and origin of the Proto-Indo-European word *sem-

Confidence
Established

Reconstruction

Beekes sets up *sem- 'one', with the nominative *sem-s.[1] In his handbook he gives it a hysterodynamic paradigm: nominative *sōm, accusative *sém-m, genitive *sm-ós, dative *sm-éi.[2] The feminine is *sm-ih₂.[2][1] De Vaan writes *sm- 'one' for its use in compounds.[3]

Morphology

Adams takes Tocharian B ṣe as the only direct reflex of the athematic inflection, from *sēm-s or *sem-s.[4] Armenian generalised the feminine.[1] Martirosyan reconstructs a Proto-Armenian masculine *hem- from *sem- beside a feminine *miya-.[5] An ablauting variant is Ancient Greek ὁμός (homós, “one and the same”).[1]

Evidence

Greek, Armenian and Tocharian provide the evidence for the stem, according to Beekes.[2] Latin has it in compounds, and Gothic probably too.[1] KEWA connects the Sanskrit words for 'one' in compounds and for 'same' with it.[6] Beekes takes Hittite šī- (“one”) from a variant *si.[2] Kloekhorst reconstructs it as *sih₂.[7]

Competing analyses

Beekes notes that some Greek and Germanic forms require *sm̥H-o-, and de Vaan derives Latin similis from *smh₂-el-i-.[8][9] The word for 'summer' is a different root, *semh₂-: Kroonen reconstructs it as *s(e)mH-, and Martirosyan prefers an accusative *smh₂er-m for the Armenian form.[10][11]

Meanings

  1. one[1][3]

Beekes's handbook gives the range 'one, together, united'.[2]

Derivatives

  • *sm-ih₂, feminine: Ancient Greek μία (mía), Old Armenian մի (mi).[1][2]
  • *sm̥-per: Latin semper (“always”).[3]
  • Sanskrit सम (samá, “same, equal”).[12][5]
  • Gothic 𐍃𐌹𐌽𐍄𐌴𐌹𐌽𐍃 (sinteins, “daily”).[1]

Reflexes

  • Greek: Ancient Greek εἷς (heîs, “one”).[1]
  • Armenian: Old Armenian մի (mi, “one”).[5]
  • Tocharian: Tocharian B ṣe (“one”).[4]
  • Italic: Latin semper (“always”), Latin simplex (“having a single layer, simple”).[3]
  • Celtic: Old Irish emid (“as it were, nearly”).[13]
  • Indo-Aryan: Sanskrit सम (samá, “same, equal”).[12]

References

  1. ^ a b c d e f g h i Beekes, Robert S. P. (2010), Etymological Dictionary of Greek, with the assistance of Lucien van Beek, Leiden Indo-European Etymological Dictionary Series 10, Leiden; Boston: Brill, p. s.v. εἷς
  2. ^ a b c d e f Beekes, Robert S. P. (2011), Comparative Indo-European Linguistics: An Introduction, 2nd ed., revised by Michiel de Vaan, Amsterdam: Benjamins, p. 262
  3. ^ a b c d 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. sem
  4. ^ a b Adams, Douglas Q. (2013), A Dictionary of Tocharian B, 2nd ed., Amsterdam: Rodopi, p. 721
  5. ^ a b c Martirosyan, Hrach K. (2010), Etymological Dictionary of the Armenian Inherited Lexicon, Leiden: Brill, p. 481
  6. ^ Mayrhofer, Manfred (1956–1980), Kurzgefasstes etymologisches Wörterbuch des Altindischen, Heidelberg: Winter, p. 434
  7. ^ Kloekhorst, Alwin (2008), Etymological Dictionary of the Hittite Inherited Lexicon, Leiden: Brill, p. 750
  8. ^ Beekes, Robert S. P. (2010), Etymological Dictionary of Greek, with the assistance of Lucien van Beek, Leiden Indo-European Etymological Dictionary Series 10, Leiden; Boston: Brill, p. s.v. ἁμο-
  9. ^ 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. similis
  10. ^ Kroonen, Guus (2013), Etymological Dictionary of Proto-Germanic, Leiden Indo-European Etymological Dictionary Series 11, Leiden / Boston: Brill, p. 491
  11. ^ Martirosyan, Hrach K. (2010), Etymological Dictionary of the Armenian Inherited Lexicon, Leiden: Brill, p. 60
  12. ^ a b Mayrhofer, Manfred (1956–1980), Kurzgefasstes etymologisches Wörterbuch des Altindischen, Heidelberg: Winter, p. 436
  13. ^ Matasović, Ranko (2009), Etymological Dictionary of Proto-Celtic, Leiden: Brill, p. 340
Cite this entry

“*sem-.” Etymologically, 7 Nov. 2026, etymologically.com/ine-pro/*sem-. Accessed 8 Nov. 2026.

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