Where does “Wysiadły” come from?

Wysiadły (Polish) comes from Polish wysiąść, from Polish siąść, from Old Polish sieść, from Proto-Slavic sěsti, from Proto-Balto-Slavic *sḗˀstei, from Proto-Indo-European sḗd- — to sit.

Ancestry of “Wysiadły”, step by step

StepLanguageWordMeaning
1Polishwysiąśćto get out, to get off, to disembark, to detrain, to deplane
2Polishsiąśćto sit down
3Old Polishsieśćto sit down
4Proto-Slavicsěstito sit down
5Proto-Balto-Slavic*sḗˀsteito sit down
6Proto-Indo-Europeansḗd-to sit
Every word from Proto-Indo-European sḗd- →Every word from Proto-Balto-Slavic *sḗˀstei →Every word from Proto-Slavic sěsti →