Where does “zamczysko” come from?

zamczysko (Polish) comes from Polish zamek, from Middle High German slōz, from Old High German sloz, from Proto-Germanic slutą.

Ancestry of “zamczysko”, step by step

StepLanguageWordMeaning
1Polishzameklock; zip fastener, zipper, zip; castle
2Middle High Germanslōz—
3Old High Germansloz—
4Proto-Germanicslutą—
Every word from Proto-Germanic slutą →Every word from Old High German sloz →Every word from Middle High German slōz →