Where does “плаванье” come from?

плаванье (Russian) comes from Russian пла́вать, from Proto-Slavic plavati, from Proto-Slavic plàviti, from Proto-Slavic -vati.

Ancestry of “плаванье”, step by step

StepLanguageWordMeaning
1Russianпла́ватьto swim
2Proto-Slavicplavatito swim; to float; to sail
3Proto-Slavicplàvitito float, to sail
4Proto-Slavic-vati—
Every word from Proto-Slavic -vati →Every word from Proto-Slavic plàviti →Every word from Proto-Slavic plavati →