Etymograph

English

quader

Quader comes from Latin quadrō ‘to make four-cornered, make square’, and goes back to Proto-Indo-European *kʷetwṓr.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*kʷetwṓr1reconstructed
  2. Proto-Italicc. 1500–700 BCE*kʷettwōr1‘four’reconstructed
  3. Latinc. 75 BCE–200 CEquattuor1‘four’
  4. Latinc. 75 BCE–200 CEquadrus1‘square’
  5. Latinc. 75 BCE–200 CEquadrō2as quadrāre‘to make four-cornered, make square’
  6. Middle Englishc. 1150–1500quadre2
  7. Englishtodayquader2

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, Latin quadro
  2. 2 Wiktionary, English quader

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*kʷetwṓrWiktionary, Latin quadroreconstructed
  2. Proto-Italicc. 1500–700 BCE*kʷettwōrWiktionary, Latin quadro‘four’reconstructed
  3. Latinc. 75 BCE–200 CEquattuorWiktionary, Latin quadro‘four’
  4. Latinc. 75 BCE–200 CEquadrusWiktionary, Latin quadro‘square’
  5. Latinc. 75 BCE–200 CEquadrōWiktionary, English quaderas quadrāre‘to make four-cornered, make square’
  6. Middle Englishc. 1150–1500quadreWiktionary, English quader
  7. EnglishtodayquaderWiktionary, English quader

The story

Attested in Middle English from the 15th century.

Full etymology on Wiktionary

Linked words

through Proto-Indo-European *kʷetwṓr

four, 26 more

through Latin quattuor ‘four’

cater, cadre, quadruple, cuatro, quatre, quatrain, 24 more

through Latin quadrus ‘square’

squadron, 10 more

through Latin quadrō ‘to make four-cornered, make square’

square, squad, quarry, quadrant, quadratic, quadra, 7 more

Today it means

verb To quadrate.

Sources

Sources: Wiktionary, “quader”; the older steps come from the Wiktionary entry for Latin quadro. 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 *kʷetwṓr / quader

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