Liddell-Scott-Jones

δὺο δύο (duo duo) two by two ^G:A
combination of: δύο (δύο+δύο)

Related to: δὺο δύο [ῠ],

also δύω in Epic dialect, Eleg. and late, [δὺο δύο ῥοπάς should be read in 5th c.BC: Euripides Tragicus “Helena” 1090)">Refs 5th c.BC+], nor in Attic dialect Prose or Inscrr.: Laconian dialect accusative δύε [Refs]: genitive and dative δυοῖν [Refs 5th c.BC+]-]; later Attic dialect also δυεῖν (especially in feminine genitive) found in codices of [Refs 5th c.BC+]; Boeotian dialect δουῖν [Refs 6th c.BC+], etc.: early Attic dialect Inscrr. have δυοῖν [Refs]; Ionic dialect genitive δυῶν [Refs 5th c.BC+]; δυῶν also Doric dialect, [Refs]— Used indeclinable, like{ἄμφω}, by [δὺο δύο μοιράων 8th c.BC: Ilias Homerus Epicus “Illiad” 10.253; δύω κανόνεσσι 13.407, etc.; so in 5th c.BC: Herodotus Historicus ">Refs 8th c.BC+] and Attic dialect, δὺο δύο νεῶν [δὺο δύο ζεύγεσι [prev. author] 3.130; δὺο δύο νεῶν 5th c.BC: Thucydides Historicus 3.89; δὺο δύο πλέθρων 5th-6th c.BC: Xenophon Historicus “Anabasis” 3.4.9 ">Refs 5th c.BC+]; with dual, δὺο δύο μναῖν uncertain reading [Refs]; but not in Trag. and rare in Comedy texts, ἔτεσιν δὺο δύο [Refs 4th c.BC+]: not in Attic dialect Inscrr. before the Roman period, [δὺο δύο and δύω">Refs 8th c.BC+] are sometimes joined with plural Nouns, δὺο δύο δ᾽ ἄνδρες [Refs]; also in Trag., δὺο δύο κριούς [Refs 5th c.BC+]; in Attic dialect Prose, δὺο δύο τέχνας [Refs 5th c.BC+]; but δυοῖν is rare with plural Nouns, ὀρθοστάταις δυοῖν [Refs]; ἕνα καὶ δὺο δύο one or two, a few, [Refs 8th c.BC+]; εἰς δὺο δύο two and two, [Refs]; σὺν δὺο δύο two together, [Refs 8th c.BC+]; δὺο δύο ποιεῖν τὴν πόλιν to split the state into two, divide it, [Refs 4th c.BC+]