Where does “ĉu” come from?

ĉu (Esperanto) comes from Polish czy, from Proto-Slavic či, from Proto-Indo-European *kʷís.

ĉu (Esperanto): introduces a yes-no question; whether; Ends a...

Definitions

  1. introduces a yes-no question; whether; Ends a...

Ancestry of “ĉu”, step by step

ĉu traces back through two separate lines of ancestry.

via Polish czy

StepLanguageWordMeaning
1Polishczy"interrogative particle: introduces a yes-no...
2Proto-Slavicčiif, whether; or
3Proto-Indo-European*kʷís—

via Ukrainian чи

StepLanguageWordMeaning
1Ukrainianчиinterrogative particle: introduces a question;...
Every word from Proto-Indo-European *kʷís →Every word from Proto-Slavic či →Every word from Polish czy →