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Verbal adjective from Proto-Indo-European *ḱes- (to cut), the same root of careō (I lack).



castus (feminine casta, neuter castum); first/second declension

  1. morally pure, guiltless
  2. pure, chaste, free from barbarisms
  3. religious, pious


First/second declension.

Number Singular Plural
Case / Gender Masculine Feminine Neuter Masculine Feminine Neuter
nominative castus casta castum castī castae casta
genitive castī castae castī castōrum castārum castōrum
dative castō castō castīs
accusative castum castam castum castōs castās casta
ablative castō castā castō castīs
vocative caste casta castum castī castae casta

Derived terms[edit]



castus m (genitive castūs); fourth declension

  1. (ante-Classical, post-classical) an abstinence from sensual enjoyments on religious grounds


Fourth declension.

Case Singular Plural
nominative castus castūs
genitive castūs castuum
dative castuī castibus
accusative castum castūs
ablative castū castibus
vocative castus castūs


Derived terms[edit]


  • castus in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • castus in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • du Cange, Charles (1883), “castus”, in G. A. Louis Henschel, Pierre Carpentier, Léopold Favre, editors, Glossarium Mediæ et Infimæ Latinitatis (in Latin), Niort: L. Favre
  • castus in Gaffiot, Félix (1934) Dictionnaire Illustré Latin-Français [Illustrated Latin-French Dictionary], Hachette
  • De Vaan, Michiel (2008) Etymological Dictionary of Latin and the other Italic Languages (Leiden Indo-European Etymological Dictionary Series; 7), Leiden, Boston: Brill