Where does “درگاہ” come from?

درگاہ (Urdu) comes from Persian درگاه, from Middle Persian dlgʾs.

Ancestry of “درگاہ”, step by step

Step	Language	Word	Meaning
1	Persian	درگاه	doorway, threshold; portal, entrance; dargah
2	Middle Persian	dlgʾs	—

درگاہ — Etymology, Origin & Word History | Etymology Explorer