Proto-IE: *duwo
Meaning: num.: two
Hittite: da-n 'zweiter', da-mai 'anderer, zweiter', da-juga- 'zweijährig' (Friedrich 203 ff); ?? dujanalli 'der vierte' (Friedrich 227)
Tokharian: A wät, B wate (PT *wäte) 'second' (Adams 576); A wu (m.), we (f.), B wi (598)
Old Indian: m. dvā́, dvāú, ved. duvāú, duvā́, f., n. dvé, ved. duvé; dvayá- 'double'; dvi-, dvíḥ 'twice'
Avestan: m. dva, f., n. baē; bi-, biš 'zweimal'
Armenian: erku '2', erko-tasan '12', erki 'zwei-'
Old Greek: dü̆́ō (Ep., Eleg.), dǘo, düṓ-deka, dṓ-deka; doi̯ói̯ 'doppelt, zwei'; di-, dís(*dwi-, *dwis)
Latin: duō, duae; du-, bī-, bis (OLat duis)
Other Italic: Umbr m. dur 'duo', acc. desen-duf m. '12', duir 'duobus', acc. n. tuva
Celtic: OIr m. dāu, dō, procl. dā, f. dī, n. dā n-, Cymr, Bret m. dou, f. Cymr dwy usw.
Albanian: dü
Russ. meaning: два
Comments: For other derivates see WP.
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