Where does “plošinka” come from?

plošinka (Czech) comes from Czech plošina, from Czech -ina, from Old Czech -ina, from Proto-Slavic -ina — Denominal, forming collectives denoting something...

Ancestry of “plošinka”, step by step

StepLanguageWordMeaning
1Czechplošinaplateau
2Czech-inanoun forming suffix
3Old Czech-inanoun forming suffix
4Proto-Slavic-inaDenominal, forming collectives denoting something...
Every word from Proto-Slavic -ina →Every word from Czech -ina →Every word from Old Czech -ina →