Where does “Gacek” come from?

Gacek (English) comes from Polish Gacek, from Old Polish gace, from Proto-Slavic *gaťę — underwear.

Ancestry of “Gacek”, step by step

StepLanguageWordMeaning
1PolishGaceklong-eared bat
2Old Polishgacepants, trousers
3Proto-Slavic*gaťęunderwear
Every word from Proto-Slavic *gaťę →Every word from Old Polish gace →Every word from Polish Gacek →