Where does “bekula” come from?

bekula (Polish) comes from Polish bekać, from Proto-Slavic běkati, from Proto-Slavic -kati, from Proto-Slavic bьlkъ!.

Ancestry of “bekula”, step by step

StepLanguageWordMeaning
1Polishbekaćto burp, to belch
2Proto-Slavicběkatito bleat, to yell
3Proto-Slavic-katiCreates onomatopoeic verbs denoting an action of...
4Proto-Slavicbьlkъ!—
Every word from Proto-Slavic bьlkъ! →Every word from Proto-Slavic -kati →Every word from Proto-Slavic běkati →