duo Latin · revision 4665

+ {{infobox|confidence=established|formation=inherited|attested=Naevius|origins=ine-pro *dwóh₁}}

+

+ ==Pronunciation==

+ * IPA (Classical): [ˈdu.ɔ]^(Wiktionary)

+ * IPA (Ecclesiastical): [ˈduː.o]^(Wiktionary)

+

+ ==Forms==

+ '''duo''' (feminine duae, neuter duo); numeral, plural only^(Wiktionary)

+ The accusative masculine is ''duōs'' or ''duo'', and inscriptions have a neuter ''dua'', which Quintilian calls a barbarism.^(de Vaan 2008)^(OLD 2012)^(Lewis & Short 1879) The genitive is ''duōrum'' or ''duum''.^(de Vaan 2008)^(Gaffiot 2016)

+

+ ==Etymology==

+ It is [[inh|itc-pro|*duō]], [[inh|ine-pro|*du-o-h₁|t=two]], an old dual; the final vowel was shortened.^(de Vaan 2008)^(Wiktionary) Cognate with [[xum|dur|t=two]], [[sga|dáu|t=two]], [[sa|द्व|tr=dvá|t=two]], [[grc|δύο|tr=dúo|t=two]], [[cu|дъва|tr=dŭva|t=two]] and [[ang|twā|t=two]].^(de Vaan 2008)^(Wiktionary)^(OLD 2012)

+

+ ==Earliest recorded meaning==

+ It appears in Very Old Latin and in Naevius.^(de Vaan 2008) Köbler dates Naevius c. 235–200 BC.^(Köbler 2010)

+

+ ==Semantic evolution==

+ It was the number two, and with the article sense “the two, both”.^(Georges 1913)^(OLD 2012) It formed [[duodecim]] “twelve”, [[ducentī]] “two hundred” and [[duumvirī]], a board of two men.^(de Vaan 2008)

+

+ Proto-Romance ''*/ˈdʊ-i/'' “two” is continued in all Romance languages.^(DÉRom) It survives as [[it|due]], [[fr|deux]], [[pt|dois]] and [[ro|doi]].^(Wiktionary) English ''dual'' comes from [[duālis]], and ''double'' from [[duplus]].^(Etymonline)

+

+ ==Timeline==

+ * c. 235–200 BC – Naevius uses it.^(de Vaan 2008)^(Köbler 2010)

+ * c. 1300 – English ''double'' is recorded, from Old French ''doble'', from ''duplus''.^(Etymonline)

+ * c. 1600 – English ''dual'' is recorded, from ''duālis''.^(Etymonline)

+

+ ==Meanings==

+ ===Numeral===

+ # [[m|en|two|alt=Two]].^(OLD 2012)^(Lewis & Short 1879)

+ # The two, [[m|en|both]].^(Georges 1913)^(MLW)

+

+ ==Word family==

+ * [[duālis]]

+ * [[ducentī]]

+ * [[ducentum]]

+ * [[duōdecas]]

+ * [[duodecim]]

+ * [[duodennis]]

+

+ ==Related words==

+ * [[bis]]

+ * [[dis]]

+ * [[duellum]]

+ * [[en|dual]]

+ * [[en|double]]

+ * [[en|two]]

+

+ ==Usage notes==

+ Isidore says there are two kinds of offering, a gift and a sacrifice.^(Isidore)

+

+ ==References==

+ {{reflist}}