Etymograph

English

disjunction

Disjunction comes from Latin disiunctiō ‘separation’, from iungō ‘to join, unite, fasten, yoke, harness, attach’, and ultimately from Proto-Indo-European *yewg-.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*yewg-1‘to join, to yoke, to tie together’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*yunégti1‘to be joining’reconstructed
  3. Proto-Italicc. 1500–700 BCE*jungō1‘to yoke’reconstructed
  4. Latinc. 75 BCE–200 CEiungō1‘to join, unite, fasten, yoke, harness, attach’
  5. Latinc. 75 BCE–200 CEdisiungō2‘to disjoin, disunite, separate, part, divide’
  6. Latinc. 75 BCE–200 CEdisiunctiō3‘separation’
  7. Old Frenchc. 842–1400disjunction3
  8. Englishearliest quotation 2017disjunction3

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, Latin disiungo
  2. 2 Wiktionary, Latin disiunctio
  3. 3 Wiktionary, English disjunction
  4. Earliest quotation in Wiktionary’s entry: 2017, Ferdinand Mount, Umbrageousness: “The disjunction between the despotism the British had been…”.

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*yewg-Wiktionary, Latin disiungo‘to join, to yoke, to tie together’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*yunégtiWiktionary, Latin disiungo‘to be joining’reconstructed
  3. Proto-Italicc. 1500–700 BCE*jungōWiktionary, Latin disiungo‘to yoke’reconstructed
  4. Latinc. 75 BCE–200 CEiungōWiktionary, Latin disiungo‘to join, unite, fasten, yoke, harness, attach’
  5. Latinc. 75 BCE–200 CEdisiungōWiktionary, Latin disiunctio‘to disjoin, disunite, separate, part, divide’
  6. Latinc. 75 BCE–200 CEdisiunctiōWiktionary, English disjunction‘separation’
  7. Old Frenchc. 842–1400disjunctionWiktionary, English disjunction
  8. Englishearliest quotation 2017disjunctionWiktionary, English disjunction. Earliest quotation in Wiktionary’s entry: 2017, Ferdinand Mount, Umbrageousness: “The disjunction between the despotism the British had been…”

Linked words

through Proto-Indo-European *yewg- ‘to join, to yoke, to tie together’

joint, yoga, rejoin, yogi, yoke, jodi, jugular, injunction, conjugate, zygote, subjugate, yojana, conjugation, yuga, 34 more

through Proto-Italic *jungō ‘to yoke’

adjoining, joiner, adjoint, enjoin, 10 more

through Latin iungō ‘to join, unite, fasten, yoke, harness, attach’

join, conjunction, junta, adjunct, juxtaposition, juncture, jostle, subjunctive, conjunct, 14 more

through Latin disiungō ‘to disjoin, disunite, separate, part, divide’

disjoint

Today it means

noun The act of disjoining; disunion, separation.

Sources

Sources: Wiktionary, “disjunction”; the older steps come from the Wiktionary entries for Latin disiungo, Latin disiunctio. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.

Etymograph / Proto-Indo-European *yewg- / disjunction

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