Where does “dokuczny” come from?

dokuczny (Polish) comes from Polish dokuczyć, from Serbo-Croatian dokučiti, from Serbo-Croatian kȕk, from Proto-Slavic kъlkъ, from Proto-Balto-Slavic kaukāˀ, from Proto-Indo-European klHk(ᵂ)-(n)-.

Ancestry of “dokuczny”, step by step

StepLanguageWordMeaning
1Polishdokuczyćto trouble, to bother, to upset, to cause suffering to
2Serbo-Croatiandokučitito comprehend, understand, figure out; to reach
3Serbo-Croatiankȕkhip
4Proto-Slavickъlkъ—
5Proto-Balto-Slavickaukāˀ—
6Proto-Indo-EuropeanklHk(ᵂ)-(n)-—
Every word from Proto-Indo-European klHk(ᵂ)-(n)- →Every word from Proto-Balto-Slavic kaukāˀ →Every word from Proto-Slavic kъlkъ →