осмдесѧтый

• ѡсмъдесѧтый (osmdesjatyj), осмьдесѧтый (osmʹdesjatyj), ѡсмидесꙗтый (osmidesjatyj)
• восмъдесѧтый (vosmdesjatyj)

Inherited from Old East Slavic *осмьдесѧтꙑи, *осмьдесѧтъи, from Proto-Slavic *osmьdesętъ (“80th”), from compound of *osmь (“8”) + *desę̃tъ (“10th”).^[1] Cognate with Russian восьмидеся́тый (vosʹmidesjátyj), Old Church Slavonic осмьдесѧтꙑи and Old Czech osmdesátý, osmedesátý.

осмдесѧтый • (osmdesjatyj)

1. eightieth (80th)

• Belarusian: васьмідзеся́ты (vasʹmidzjesjáty)
• Carpathian Rusyn: вӱсямдеся́тый (vüsjamdesjátŷj)
• Ukrainian: вісімдеся́тий (visimdesjátyj)

• Hrynchyshyn, D. H., editor (1978), “*осмъдесятыи”, in Словник староукраїнської мови XIV–XV ст. [Dictionary of the Old Ukrainian Language of the 14ᵗʰ–15ᵗʰ cc.] (in Ukrainian), volume 2 (Н – Ѳ), Kyiv: Naukova Dumka, page 95
• The template Template:R:zle-obe:HSBM does not use the parameter(s):

  url=vosmdesyatyj

  Please see Module:checkparams for help with this warning.Zhurawski, A. I., editor (1984), “восмдесятый”, in Гістарычны слоўнік беларускай мовы [Historical Dictionary of the Belarusian Language] (in Belarusian), numbers 4 (вкупитися – вспевати), Minsk: Navuka i tekhnika, page 204
• The template Template:R:zle-obe:HSBM does not use the parameter(s):

  url=osmdesyatyj

  Please see Module:checkparams for help with this warning.Bulyka, A. M., editor (2002), “осмдесятый, осмьдесятый”, in Гістарычны слоўнік беларускай мовы [Historical Dictionary of the Belarusian Language] (in Belarusian), numbers 22 (оддыханье – ость), Minsk: Belaruskaia navuka, →ISBN, page 390
• The template Template:R:zle-obe:HSBM does not use the parameter(s):

  url=osmidesyatyj

  Please see Module:checkparams for help with this warning.Bulyka, A. M., editor (2002), “осмидесятый”, in Гістарычны слоўнік беларускай мовы [Historical Dictionary of the Belarusian Language] (in Belarusian), numbers 22 (оддыханье – ость), Minsk: Belaruskaia navuka, →ISBN, page 292