duplus

Latin

Latin numbers ^(edit)

	20[a], [b], [c]
←  1	II 2	3  →
Cardinal: duo     Ordinal: secundus, alter     Adverbial: bis     Proportional: duplus     Multiplier: duplex, alterplex, biplex     Distributive: bīnus     Collective: bīniō     Fractional: dīmidius, sēmis

Etymology

Inherited from Proto-Italic *duplos. By surface analysis, duo +‎ -plus. Cf. Ancient Greek διπλόος (diplóos, “double”), from δι- (di-), from δύο (dúo, “two”), + -πλόος (-plóos, “-fold”), and Proto-Germanic *twīflaz (“doubt”).

Pronunciation

• (Classical Latin) IPA^(key): /ˈdu.plus/, [ˈd̪ʊpɫ̪ʊs̠]
• (modern Italianate Ecclesiastical) IPA^(key): /ˈdu.plus/, [ˈd̪uːplus]

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	duplae	duplō		duplīs
Accusative	duplum	duplam	duplum		duplōs	duplās	dupla
Ablative	duplō	duplā	duplō		duplīs
Vocative	duple	dupla	duplum		duplī	duplae	dupla

Derived terms

• duplō (Late or Legal Latin)

Descendants

• Italo-Romance:
  • Italian: doppio
    • → Sardinian: dopiu
• Padanian:
  • Gallo-Italic:
    • Ligurian: doggio
    • Lombard: dopi
    • Piedmontese: dobi
  • Friulian: dopli
  • Romansch: dubel, dobel
  • Venetan: dopio, dupio
• Gallo-Romance:
  • Catalan: doble
  • Franco-Provençal: doblo
  • Old French: doble (see there for further descendants)
  • Occitan: doble
• Ibero-Romance:
  • Asturian: doble, duble, doblu, dublu
  • Old Galician-Portuguese: dobro
    • Galician: dobre
    • Portuguese: dobre, dobro
  • Spanish: doble, doblo
• Borrowings:
  • → English: duple, duplo-
  • → Italian: duplo
  • → Portuguese: duplo
  • → Romanian: dublu
  • → Spanish: duplo
  • → Sicilian: dupru, duplu, dùbulu

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.