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A borrowing, probably ultimately from Proto-Celtic *rūskos, cognate with Ancient Greek ῥίσκος (rhískos, chest, trunk). According to Beekes the change from the Celtic vowel is likely explained by the Ancient Greek word having been borrowed via Phrygian from Galatian.


riscus m (genitive riscī); second declension

  1. box, chest, trunk
  2. (Medieval Latin) window
    • 1712, Engelbert Kaempfer, Amoenitatēs Exoticae I.8.107:
      Aliquando sine impluvio exstructum, aedificii molem constituit compressam, paucis columnis nixam, luminis admittentem modicum per riscos affabre clat[h]ratos.


Second-declension noun.

Case Singular Plural
Nominative riscus riscī
Genitive riscī riscōrum
Dative riscō riscīs
Accusative riscum riscōs
Ablative riscō riscīs
Vocative risce riscī


  • riscus”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • riscus”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • riscus 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)
  • riscus in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette
  • riscus”, in Harry Thurston Peck, editor (1898) Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
  • riscus in Ramminger, Johann (accessed 16 July 2016) Neulateinische Wortliste: Ein Wörterbuch des Lateinischen von Petrarca bis 1700[1], pre-publication website, 2005-2016
  • Beekes, Robert S. P. (2010) Etymological Dictionary of Greek (Leiden Indo-European Etymological Dictionary Series; 10), with the assistance of Lucien van Beek, Leiden, Boston: Brill, →ISBN, page 1288
  • Steiner-Weber, Astrid (2012), “riscus”, in Glossar zu Engelbert Kaempfer