Etymograph

English

confeder

Confeder comes from Late Latin confoederō ‘to unite or join by a league’, from Latin foederō ‘to seal or ratify an agreement or treaty’, and ultimately from Proto-Indo-European *bʰeydʰ- ‘to trust’.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*bʰeydʰ-1‘to trust’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*bʰeydʰós1‘faithful, trustworthy’reconstructed
  3. Proto-Italicc. 1500–700 BCE*feiðos1‘faithful, reliable’reconstructed
  4. Latinc. 75 BCE–200 CEfoedus1
  5. Latinc. 75 BCE–200 CEfoederō1‘to seal or ratify an agreement or treaty’
  6. Late Latinc. 200–600 CEconfoederō2‘to unite or join by a league’
  7. Old Frenchc. 842–1400confederer2uncertain
  8. Middle Englishc. 1150–1500confederen2‘to confederate’
  9. Englishearliest quotation 1579confeder2

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, Latin confoedero
  2. 2 Wiktionary, English confeder
  3. Earliest quotation in Wiktionary’s entry: 1579, Thomas North: “hauing confedered together”.

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*bʰeydʰ-Wiktionary, Latin confoedero‘to trust’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*bʰeydʰósWiktionary, Latin confoedero‘faithful, trustworthy’reconstructed
  3. Proto-Italicc. 1500–700 BCE*feiðosWiktionary, Latin confoedero‘faithful, reliable’reconstructed
  4. Latinc. 75 BCE–200 CEfoedusWiktionary, Latin confoedero
  5. Latinc. 75 BCE–200 CEfoederōWiktionary, Latin confoedero‘to seal or ratify an agreement or treaty’
  6. Late Latinc. 200–600 CEconfoederōWiktionary, English confeder‘to unite or join by a league’
  7. Old Frenchc. 842–1400confedererWiktionary, English confederuncertain
  8. Middle Englishc. 1150–1500confederenWiktionary, English confeder‘to confederate’
  9. Englishearliest quotation 1579confederWiktionary, English confeder. Earliest quotation in Wiktionary’s entry: 1579, Thomas North: “hauing confedered together”

Linked words

through Proto-Indo-European *bʰeydʰ- ‘to trust’

confidence, confident, affidavit, abide, fidelity, defiance, fiduciary, bode, foi, confidant, fealty, bide, infidel, confide, diffident, perfidy, 23 more

through Proto-Italic *feiðos ‘faithful, reliable’

defy, federally, federalist, federalism, 12 more

through Latin foedus

federal, 16 more

through Latin foederō ‘to seal or ratify an agreement or treaty’

federation, 1 more

Today it means

verb To confederate.

Sources

Sources: Wiktionary, “confeder”; the older steps come from the Wiktionary entry for Latin confoedero. 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 *bʰeydʰ- / confeder

Shirt and support for this word