лошакъ

Inherited from Old East Slavic лошакъ (lošakŭ), from лоша (loša). By surface analysis, *лоша́ +‎ -акъ. Cognate with Russian лоша́к (lošák), which is from Middle Russian лоша́къ (lošák), Old Novgorodian лошакъ (lošakŭ).

лоша́къ • (transliteration needed) m anim

1. a young horse

• Belarusian: лаша́к (lašák), лоша́к (lošák), лошу́к (lošúk)
• Rusyn: лошу́к (lošúk)
• Ukrainian: лоша́к (lošák); лошу́к (lošúk) (dialectal)

• Chikalo, M. I., editor (2013), “лошакъ”, in Словник української мови XVI – I пол. XVII ст. [Dictionary of the Ukrainian Language: 16ᵗʰ – 1ˢᵗ half of 17ᵗʰ c.] (in Ukrainian), issue 16 (легкомыслность – лѧчи), Lviv: KIUS, →ISBN, page 104
• Tymchenko, E. K. (2002), “лошакъ”, in Nimchuk, V. V., editor, Матеріали до словника писемної та книжної української мови XV–XVIII ст. [Materials for the Dictionary of the Written and Book Ukrainian Language of the 15ᵗʰ – 18ᵗʰ cc.] (in Ukrainian), volume 1 (А – Н), Kyiv, New York: National Academy of Sciences of Ukraine, Ukrainian Academy of Arts and Sciences in the U.S., →ISBN, page 409