Where does “туткам се” come from?

туткам се (Bulgarian) comes from Bulgarian -кам, from Proto-Slavic -kati, from Proto-Slavic bьlkъ!.

Ancestry of “туткам се”, step by step

StepLanguageWordMeaning
1Bulgarian-камCreates onomatopoeic verbs from the corresponding interjections
2Proto-Slavic-katiCreates onomatopoeic verbs denoting an action of...
3Proto-Slavicbьlkъ!—
Every word from Proto-Slavic bьlkъ! →Every word from Proto-Slavic -kati →Every word from Bulgarian -кам →