Where does “سپره” come from?

سپره (Pashto) comes from Arabic صَفَر, from Arabic صَفِرَ — to be empty.

Ancestry of “سپره”, step by step

Step	Language	Word	Meaning
1	Arabic	صَفَر	—
2	Arabic	صَفِرَ	to be empty

سپره — Etymology, Origin & Word History | Etymology Explorer