to nine were not inflected. The early Proto-Baltic might have retained the uninflected numeral forms of *septin 'seven', *aštō 'eight', *neu̯in 'nine' as well. The reconstruction of Latvian language indicates that *septines 'seven' and *neu̯ines 'nine' with the short *i is plausible. Ordinal numbers The masculine and neuter ordinal numbers were inflected as nouns possessing word stem o while feminine ones were inflected as nouns with word stem ā. Ordinal numbers from first to tenth in Proto-Baltic were as follows: References Further reading Hill, Eugen. "Phonological evidence for a Proto-Baltic stage in the evolution of East and West Baltic". In: International journal of diachronic linguistics and linguistic reconstruction [IJDL]. 2016, 13, p. 205-232. . Kortland, Frederic. "Proto-Baltic?". In: Baltistica. 2018, t. 53, Nr. 2, pp. 175–185. DOI: 10.15388/Baltistica.53.2.2338 Svensson, Miguel Villanueva. "On the relationship between West Baltic and East Baltic". In: Baltai ir slavai: dvasinių kultūrų sankirtos. Vilnius: Versmė, 2014. pp. 162–176. . External links Lithuanian Etymological Dictionary Database (in Lithuanian) Old Prussian Language Heritage Database (in Lithuanian) Foundations of Baltic Languages, Pietro U. Dini (in English)'' Indo-European languages Proto-languages Baltic languages