Where does “fistaszek” come from?

fistaszek (Polish) comes from Russian фиста́шка, from Ottoman Turkish فستق, from Persian فستق, from Arabic فِسْتَق, from Middle Persian pstk', from Old Persian *pistaka.

Ancestry of “fistaszek”, step by step

Step	Language	Word	Meaning
1	Russian	фиста́шка	pistachio
2	Ottoman Turkish	فستق	—
3	Persian	فستق	—
4	Arabic	فِسْتَق	—
5	Middle Persian	pstk'	pistachio nut
6	Old Persian	*pistaka	—

Every word from Old Persian *pistaka →

fistaszek — Etymology, Origin & Word History | Etymology Explorer