Reconstruction:Proto-Slavic/ostь

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

From Proto-Balto-Slavic *akstis, probably from Proto-Indo-European *h₂eḱ- (“sharp”).

Noun

*ostь f

1. sharp point
2. awl
3. fishbone

Declension

Declension of *ostь (i-stem)

	Singular	Dual	Plural
Nominative	*ostь	*osti	*osti
Accusative	*ostь	*osti	*osti
Genitive	*osti	*ostьju, *osťu*	*ostьjь, *osti*
Locative	*osti	*ostьju, *osťu*	*ostьxъ
Dative	*osti	*ostьma	*ostьmъ
Instrumental	*ostьjǫ, *osťǫ*	*ostьma	*ostьmi
Vocative	*osti	*osti	*osti

^* The second form occurs in languages that contract early across /j/ (e.g. Czech), while the first form occurs in languages that do not (e.g. Russian).

Descendants

• East Slavic:
  • Russian: ость (ostʹ)
• South Slavic:
  • Slovene: ȏst (tonal orthography)
• West Slavic:
  • Polish: ość
  • Slovak: osť
  • Sorbian:
    • Lower Sorbian: wósć

Further reading

• Vasmer, Max (1964–1973), “ость”, in Этимологический словарь русского языка [Etymological Dictionary of the Russian Language] (in Russian), transl. and suppl. by Oleg Trubachyov, Moscow: Progress