duplus

Latin
Latin numbers (edit)
[a], [b] ←  1 II
2		 3  → [a], [b]
    Cardinal: duo
    Ordinal: secundus
    Adverbial: bis
    Multiplier: duplex, duplus
    Distributive: bīnī
    Fractional: dīmidius, sēmis

Etymology

From Proto-Italic *dwiplos, from duo +‎ plus.[1] Cf. Ancient Greek διπλόος (diplóos, “double”), from δι- (di-), from δύο (dúo, “two”), + -πλόος (-plóos, “-fold”), and Proto-Germanic *twīflaz (“doubt”).

Pronunciation

Adjective

duplus (feminine dupla, neuter duplum); first/second-declension adjective

  1. double (twice as much, or as big)

Declension

First/second-declension adjective.

Number Singular Plural
Case / Gender Masculine Feminine Neuter Masculine Feminine Neuter
Nominative duplus dupla duplum duplī duplae dupla
Genitive duplī duplae duplī duplōrum duplārum duplōrum
Dative duplō duplō duplīs
Accusative duplum duplam duplum duplōs duplās dupla
Ablative duplō duplā duplō duplīs
Vocative duple dupla duplum duplī duplae dupla

Derived terms

Descendants
  • Gallo-Italic:
    • Lombard: dopi, dopła
    • Piedmontese: dobi
  • Italo-Dalmatian
  • Old French: doble (see there for further descendants)
  • Old Occitan:
  • Rhaeto-Romance
  • Sardinian: dopiu
  • Venetian: dopio, dupio
  • West Iberian
  • → English: duple
  • → Italian: duplo
  • → Portuguese: duplo
  • → Romanian: dublu
  • → Spanish: duplo

References
  • “duplus”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • “duplus”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • duplus in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette
  1. De Vaan, Michiel (2008) Etymological Dictionary of Latin and the other Italic Languages (Leiden Indo-European Etymological Dictionary Series; 7)‎, Leiden, Boston: Brill, →ISBN
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