devyni

Etymology
From a previous undeclinable Eastern Baltic, from , from ,. Probably from the same stem as ; apparently had a base 4 numeric system, so that, after two 4's (= 8), 9 was the first (“new”) to be part of a complex numeral (compare 🇨🇬 =  + ).

The initial d in Eastern Baltic and Slavic is usually explained as dissimilation, given the two n's in, probably also under the influence of the initial d in. A more recent suggestion is that 🇨🇬 <, in which the h₁n sequence would yield an articulation similar to a d. This would have led to dialectal variation, with both forms preserved in parallel, the former giving rise to the Eastern Baltic terms, the latter to their 🇨🇬 counterpart. Cognates include 🇨🇬, 🇨🇬, 🇨🇬, 🇨🇬, 🇨🇬, 🇨🇬, 🇨🇬, 🇨🇬, 🇨🇬, 🇨🇬, 🇨🇬 , 🇨🇬, 🇨🇬, 🇨🇬, 🇨🇬 (< ), 🇨🇬, 🇨🇬, 🇨🇬.

Numeral

 * 1)  nine