Where does “ćákṣuṣ” come from?

ćákṣuṣ (Proto-Indo-Aryan) comes from Proto-Indo-Iranian čákšuš, from Proto-Indo-European kʷékʷḱus, from Proto-Indo-European kʷeḱ- — to see; to look.

Ancestry of “ćákṣuṣ”, step by step

StepLanguageWordMeaning
1Proto-Indo-Iraniančákšušthe eye
2Proto-Indo-Europeankʷékʷḱus—
3Proto-Indo-Europeankʷeḱ-to see; to look
Every word from Proto-Indo-European kʷeḱ- →Every word from Proto-Indo-European kʷékʷḱus →Every word from Proto-Indo-Iranian čákšuš →