Where does “baş aşağı” come from?

baş aşağı (Ottoman Turkish) comes from Ottoman Turkish baş, from Proto-Turkic baĺč — head; beginning.

Ancestry of “baş aşağı”, step by step

StepLanguageWordMeaning
1Ottoman Turkishbaş—
2Proto-Turkicbaĺčhead; beginning
Every word from Proto-Turkic baĺč →Every word from Ottoman Turkish baş →