Etymograph

English

defection

Defection comes from Latin dēfectiō ‘defection, desertion’, from dēficiō ‘to move away, leave, withdraw, break away’, and ultimately from Proto-Indo-European *dʰeh₁k-.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*dʰeh₁k-1reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*dʰh₁kyéti1reconstructed
  3. Proto-Italicc. 1500–700 BCE*θakjō1reconstructed
  4. Proto-Italicc. 1500–700 BCE*fakjō1‘to make’reconstructed
  5. Latinc. 75 BCE–200 CEfacio1‘to make, construct, fashion, frame, build, erect’
  6. Latinc. 75 BCE–200 CEdēficiō2‘to move away, leave, withdraw, break away’
  7. Latinc. 75 BCE–200 CEdēfectiō3‘defection, desertion’
  8. Englishtodaydefection3

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, Latin deficio
  2. 2 Wiktionary, Latin defectio
  3. 3 Wiktionary, English defection

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*dʰeh₁k-Wiktionary, Latin deficioreconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*dʰh₁kyétiWiktionary, Latin deficioreconstructed
  3. Proto-Italicc. 1500–700 BCE*θakjōWiktionary, Latin deficioreconstructed
  4. Proto-Italicc. 1500–700 BCE*fakjōWiktionary, Latin deficio‘to make’reconstructed
  5. Latinc. 75 BCE–200 CEfacioWiktionary, Latin deficio‘to make, construct, fashion, frame, build, erect’
  6. Latinc. 75 BCE–200 CEdēficiōWiktionary, Latin defectio‘to move away, leave, withdraw, break away’
  7. Latinc. 75 BCE–200 CEdēfectiōWiktionary, English defection‘defection, desertion’
  8. EnglishtodaydefectionWiktionary, English defection

Linked words

through Proto-Italic *θakjō

effectively, effectiveness, ineffective, affectionate, imperfection, putrefaction, 64 more

through Proto-Italic *fakjō ‘to make’

factor, difficulty, effective, interface, manufacture, facet, perfection, faction, affection, imperfect, affective, effector, deface, affectation, confectionary, 70 more

through Latin facio ‘to make, construct, fashion, frame, build, erect’

face, fact, difficult, profit, perfect, feature, facility, faculty, affair, sacrifice, effect, efficient, facial, affect, facilitate, feat, superficial, efficacy, infection, counterfeit, facade, fetish, facsimile, infect, hacienda, maleficent, parfait, facies, difficile, beautify, aficionado, efficacious, confit, beneficent, refectory, confection, 85 more

through Latin dēficiō ‘to move away, leave, withdraw, break away’

deficit, deficient, 9 more

Today it means

noun An act or incidence of defecting.

Sources

Sources: Wiktionary, “defection”; the older steps come from the Wiktionary entries for Latin deficio, Latin defectio. 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 *dʰeh₁k- / defection

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