Where does “ocucić” come from?

ocucić (Old Polish) comes from Proto-Slavic oťutiti, from Proto-Slavic ot- — out of.

Ancestry of “ocucić”, step by step

Step	Language	Word	Meaning
1	Proto-Slavic	oťutiti	to feel, to perceive
2	Proto-Slavic	ot-	out of