Where does “покаянный” come from?

покаянный (Russian) comes from Russian покаяние, from Proto-Slavic kàjati, from Proto-Indo-European kʷōy-, from Proto-Indo-European kʷey- — to pay; to avenge.

покаянный (Russian): penitential

Definitions

  1. penitential

Ancestry of “покаянный”, step by step

StepLanguageWordMeaning
1Russianпокаяниеrepentance, penitence; confession
2Proto-Slavickàjatito repent, to regret
3Proto-Indo-Europeankʷōy-—
4Proto-Indo-Europeankʷey-to pay; to avenge
Every word from Proto-Indo-European kʷey- →Every word from Proto-Indo-European kʷōy- →Every word from Proto-Slavic kàjati →
покаянный — Etymology, Origin & Word History | Etymology Explorer