Reconstruction:Proto-Slavic/bojьkъ

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Reconstruction:Proto-Slavic/bojьkъ

This Proto-Slavic entry contains reconstructed terms and roots. As such, the term(s) in this entry are not directly attested, but are hypothesized to have existed based on comparative evidence.

Proto-Slavic

Etymology

Form an earlier u-stem adjective *bojъ +‎ *-ьkъ, from Proto-Indo-European *bʰeyh₂-‎ (“to fight”). Formally equivalent to Lithuanian bajùs (“terrible”)[1], which is from the same PIE root but from another meaning to frighten (whence are Proto-Slavic *bojati (“to fear”), *bojaznь (“fear”)). The later is attested relatively late, though.

Adjective

*bojьkъ

1. feisty, ready for fight
2. brisky, energetic

Inflection

Indefinite declension of *bojьkъ (hard)

Singular	Masculine	Feminine	Neuter
Nominative	**bojьkъ	**bojьka	**bojьko
Accusative	**bojьkъ	**bojьkǫ	**bojьko
Genitive	**bojьka	**bojьky	**bojьka
Locative	**bojьcě	**bojьcě	**bojьcě
Dative	**bojьku	**bojьcě	**bojьku
Instrumental	**bojьkomь	**bojьkojǫ	**bojьkomь
Vocative	**bojьče	**bojьko	**bojьko
Dual	Masculine	Feminine	Neuter
Nominative	**bojьka	**bojьcě	**bojьcě
Accusative	**bojьka	**bojьcě	**bojьcě
Genitive	**bojьku	**bojьku	**bojьku
Locative	**bojьku	**bojьku	**bojьku
Dative	**bojьkoma	**bojьkama	**bojьkoma
Instrumental	**bojьkoma	**bojьkama	**bojьkoma
Vocative	**bojьka	**bojьcě	**bojьcě
Plural	Masculine	Feminine	Neuter
Nominative	**bojьci	**bojьky	**bojьka
Accusative	**bojьky	**bojьky	**bojьka
Genitive	**bojьkъ	**bojьkъ	**bojьkъ
Locative	**bojьcěxъ	**bojьkaxъ	**bojьcěxъ
Dative	**bojьkomъ	**bojьkamъ	**bojьkomъ
Instrumental	**bojьky	**bojьkami	**bojьky
Vocative	**bojьci	**bojьky	**bojьka

Definite declension of *bojьkъ (hard)

Singular	Masculine	Feminine	Neuter
Nominative	**bojьkъjь	**bojьkaja	**bojьkoje
Accusative	**bojьkъjь	**bojьkǫjǫ	**bojьkoje
Genitive	**bojьkajego	**bojьkyję	**bojьkajego
Locative	**bojьcějemь	**bojьcěji	**bojьcějemь
Dative	**bojьkujemu	**bojьcěji	**bojьkujemu
Instrumental	**bojьkyjimi	**bojьkǫjǫ	**bojьkyjimi
Vocative	**bojьkъjь	**bojьkaja	**bojьkoje
Dual	Masculine	Feminine	Neuter
Nominative	**bojьkaja	**bojьcěji	**bojьcěji
Accusative	**bojьkaja	**bojьcěji	**bojьcěji
Genitive	**bojьkuju	**bojьkuju	**bojьkuju
Locative	**bojьkuju	**bojьkuju	**bojьkuju
Dative	**bojьkyjima	**bojьkyjima	**bojьkyjima
Instrumental	**bojьkyjima	**bojьkyjima	**bojьkyjima
Vocative	**bojьkaja	**bojьcěji	**bojьcěji
Plural	Masculine	Feminine	Neuter
Nominative	**bojьciji	**bojьkyję	**bojьkaja
Accusative	**bojьkyję	**bojьkyję	**bojьkaja
Genitive	**bojьkъjixъ	**bojьkъjixъ	**bojьkъjixъ
Locative	**bojьkyjixъ	**bojьkyjixъ	**bojьkyjixъ
Dative	**bojьkyjimъ	**bojьkyjimъ	**bojьkyjimъ
Instrumental	**bojьkyjimi	**bojьkyjimi	**bojьkyjimi
Vocative	**bojьciji	**bojьkyję	**bojьkaja

Related terms

• *bojь (“fight”)
• *bojьcь (“fighter”)
• *bojьnъ (“military”)
• *bojevъ (“feisty, military”)

Descendants

• East Slavic:
  • Russian: бо́йкий (bójkij)
  • Ukrainian: бійкий (bijkyj)
• South Slavic:
  • Bulgarian: бояк (bojak)
    • ⇒ Bulgarian: бойко (bojko, “bravely, energetically”) (adverb)
  • Serbo-Croatian:

    Cyrillic: бо̀јак

    Latin: bòjak

References

1. Derksen, Rick (2015), “bajus”, in Etymological Dictionary of the Baltic Inherited Lexicon (Leiden Indo-European Etymological Dictionary Series; 13), Leiden, Boston: Brill, →ISBN, page 77