quadrus

Latin

Post-classically attested, thus perhaps a back-formation from quadrō. See also quattuor, quārtus.

quadrus (feminine quadra, neuter quadrum); first/second-declension adjective

	masculine	feminine	neuter	masculine	feminine	neuter
	singular			plural
nominative	quadrus	quadra	quadrum	quadrī	quadrae	quadra
genitive	quadrī	quadrae	quadrī	quadrōrum	quadrārum	quadrōrum
dative	quadrō	quadrae	quadrō	quadrīs
accusative	quadrum	quadram	quadrum	quadrōs	quadrās	quadra
ablative	quadrō	quadrā	quadrō	quadrīs
vocative	quadre	quadra	quadrum	quadrī	quadrae	quadra

Catalan: caire
Italian: squadra, quadro
Old French: esquarre
- French: équerre
- Norman: êtchèrre
- → English: square
  - → Welsh: sgwâr
Venetan: quadro
West Iberian
- Portuguese: quadro
- Spanish: cuadro
⇒ Vulgar Latin: *quadrellus
- Italo-Dalmatian
  - Dalmatian: cadrial
  - Italian: quadrello
- Old French: quarel
  - French: carreau
  - → English: quarrel
- Venetan: quarel, quareło, cuadrèl, cuarèlo, cuarèl
  - → Cimbrian: korèll
- West Iberian
  - Portuguese: quadrelo
  - Spanish: cuadrillo
→ Catalan: quadre

“quadrus”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
quadrus in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
quadrus in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.
Sihler, Andrew L. (1995) New Comparative Grammar of Greek and Latin, Oxford, New York: Oxford University Press, →ISBN
De Vaan, Michiel (2008) “quattuor”, in Etymological Dictionary of Latin and the other Italic Languages (Leiden Indo-European Etymological Dictionary Series; 7), Leiden, Boston: Brill, →ISBN, page 505