Where does “فسطاط” come from?

فسطاط (Arabic) comes from Byzantine Greek φοσσᾶτον, from Latin fossātum, from Latin fossa, from Latin fodiō, from Proto-Indo-European bʰod- — to pierce, dig.

فسطاط (Arabic): borough, camp, fortification

Definitions

borough, camp, fortification

Ancestry of “فسطاط”, step by step

Step	Language	Word	Meaning
1	Byzantine Greek	φοσσᾶτον	—
2	Latin	fossātum	}} trench particularly for military use, a ditch especially in earthwork fortifications
3	Latin	fossa	ditch, trench, moat; gutter, waterway; grave
4	Latin	fodiō	to dig, dig up, dig out; to bury; to dig or clear out the earth from a place; to mine, quarry
5	Proto-Indo-European	bʰod-	to pierce, dig

Every word from Proto-Indo-European bʰod- →Every word from Latin fodiō →Every word from Latin fossa →