Where does “cioccysko” come from?

cioccysko (Polish) comes from Polish ciotka, from Proto-Slavic tetъka, from Proto-Slavic teta — aunt.

Ancestry of “cioccysko”, step by step

StepLanguageWordMeaning
1Polishciotkaaunt
2Proto-Slavictetъka—
3Proto-Slavictetaaunt
Every word from Proto-Slavic teta →Every word from Proto-Slavic tetъka →Every word from Polish ciotka →