Reconstruction:Proto-Slavic/kъjь

From Proto-Balto-Slavic *kajas. Morphologically from *kъ(to) +‎ *jь.

*kъjь

1. which

This determiner needs an inflection-table template.

• *jь, *čьjь, *jьnъ, *kъjь, *onъ, *ovъ, *sь, *tъ, *vьśь
• *jakъ, *jьnakъ, *kakъ, *onakъ, *ovakъ, *sicь, *takъ, *vьśakъ
• *koterъ, *jeterъ

• *někъjь (“certain”)
• *nikъjь (“no, none”)

• East Slavic:
  • Russian: кой (koj)
  • Ukrainian: кой (koj)
• South Slavic:
  • Old Church Slavonic:

    Old Cyrillic script: кꙑи (kyi)

    Glagolitic script: [Term?]

  • Bulgarian: кой (koj)
  • Macedonian: кој (koj)
  • Serbo-Croatian:

    Cyrillic script: ко̀јӣ (Štokavian), ка̏ј (Kajkavian)

    Latin script: kòjī (Štokavian), kȁj (Kajkavian)

• West Slavic:
  • Old Czech: ký
    • Czech: ký
  • Polish: ki
  • Slovak: ký

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