Where does “plavání” come from?

plavání (Czech) comes from Czech plavat, from Old Czech plavati, from Proto-Slavic plavati, from Proto-Slavic plàviti, from Proto-Slavic -vati.

plavání (Czech): swimming

Definitions

Step	Language	Word	Meaning
1	Czech	plavat	to swim
2	Old Czech	plavati	—
3	Proto-Slavic	plavati	to swim; to float; to sail
4	Proto-Slavic	plàviti	—
5	Proto-Slavic	-vati	—

plavání — Etymology, Origin & Word History | Etymology Explorer