Related to: δύο [ῠ],
also δύω in Epic dialect, Eleg. and late, [[ “SIG” 1231 (Nicomedia, 3rd-4th c.AD), not in _Ionic dialect_ Inscrr. nor in Trag. (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 [[ “IG” 5(1).1; Thess. _feminine_ δύας [prev. work]9(2).517] Refs]: genitive and dative δυοῖν [[ 5th c.BC: Hippocrates Medicus “περὶ διαίτης” 1.3, but _falsa lectio_ in 5th c.BC: Herodotus Historicus 1.11, 91 [used as monosyllabic in 5th c.BC: Sophocles Tragicus “Oedipus Tyrannus” 640, compare δώδεκα for δυώδ] Refs 5th c.BC+]-]; later Attic dialect also δυεῖν (especially in feminine genitive) found in codices of [[ 5th c.BC: Euripides Tragicus “Electra” 536, cited from 5th c.BC: Thucydides Historicus by 2nd c.AD: Aelius Dionysius Grammaticus (?) “fragment” 372, compare 1.20 (codex Laur.)] Refs 5th c.BC+]; Boeotian dialect δουῖν [[ 6th c.BC: Corinna Lyrica “Supp.” 2.54; later δυσί, δυσὶν ἡμέραις 5th c.BC: Thucydides Historicus 8.101 codices, δυσὶν ἡμέρῃσι variant in 5th c.BC: Hippocrates Medicus “Acut.(Sp.”) 67; δυοῖν ὄμμασι καὶ δυσὶν ἀκοαῖς 4th c.BC: Aristoteles Philosophus “Politica” 1287b27, compare 4th-3rd c.BC: Menander Comicus 699, “SIG” 344.26 (Teos, 4th c.BC)] Refs 6th c.BC+], etc.: early Attic dialect Inscrr. have δυοῖν [[ “IG” 12.3.10, +others, later δυεῖν “SIG” 2587.286, “IG” 22.463.78, +others, from 3rd C on δυσί [prev. work]1028.27, +others] Refs]; Ionic dialect genitive δυῶν [[ “GDI” 5653d9 (from Chios), 5th c.BC: Herodotus Historicus 1.94, 130, etc., _dative_ δυοῖσι [prev. work] 32, 7.104 ] Refs 5th c.BC+]; δυῶν also Doric dialect, [[ “Leg.Gort.” 1.40, “Tab.Heracl.” 1.139; δυοῖς “Leg.Gort.” 7.46.] Refs]— Used indeclinable, like{ἄμφω}, by [[ 8th c.BC: Homerus Epicus (who has no _genitive_ or _dative_ δυοῖν), τῶν 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, δύο νεῶν [[ 5th c.BC: Herodotus Historicus 8.82; δύο ζεύγεσι [prev. author] 3.130; δύο νεῶν 5th c.BC: Thucydides Historicus 3.89; δύο πλέθρων 5th-6th c.BC: Xenophon Historicus “Anabasis” 3.4.9 ] Refs 5th c.BC+]; with dual, δύο μναῖν uncertain reading [[ [prev. author] “Mem.” 2.5.2 ] Refs]; but not in Trag. and rare in Comedy texts, ἔτεσιν δύο [[ 2nd c.AD: Alexander Rhetor 105; δύ᾽ ἔτεσιν 4th-3rd c.BC: Damoxenus Comicus 2.3 ] Refs 4th c.BC+]: not in Attic dialect Inscrr. before the Roman period, [[ “IG” 3.1443, +others:—two, 8th c.BC: Ilias Homerus Epicus “Illiad” 1.16, etc.; in 8th c.BC: Homerus Epicus, δύο and δύω] Refs 8th c.BC+] are sometimes joined with plural Nouns, δύο δ᾽ ἄνδρες [[ 18.498, +others] Refs]; also in Trag., δύο κριούς [[ 5th c.BC: Sophocles Tragicus “Ajax” 237 (Lyric poetry)] Refs 5th c.BC+]; in Attic dialect Prose, δύο τέχνας [[ 5th-6th c.BC: Plato Philosophus “Gorgias” 464b ] Refs 5th c.BC+]; but δυοῖν is rare with plural Nouns, ὀρθοστάταις δυοῖν [[ “IG” 2.1054.64 ] Refs]; ἕνα καὶ δύο one or two, a few, [[ 8th c.BC: Ilias Homerus Epicus “Illiad” 2.346; δύ᾽ ἢ τρεῖς 5th-6th c.BC: Aristophanes Comicus “Pax” 829, compare 5th-6th c.BC: Xenophon Historicus “Historia Graeca (Hellenica)” 3.5.20 ] Refs 8th c.BC+]; εἰς δύο two and two, [[ [prev. author] “Cyr.” 7.5.17 ] Refs]; σὺν δύο two together, [[ 8th c.BC: Ilias Homerus Epicus “Illiad” 10.224, 5th c.BC: Herodotus Historicus 4.66 ] Refs 8th c.BC+]; δύο ποιεῖν τὴν πόλιν to split the state into two, divide it, [[ 4th c.BC: Aristoteles Philosophus “Politica” 1310a4. ] Refs 4th c.BC+]