Where does “τετράστῳον” come from?

τετράστῳον (Ancient Greek) comes from Ancient Greek στοά, from Proto-Hellenic stōyyā́, from Proto-Indo-European stoh₂wih₂, from Proto-Indo-European steh₂- — to stand.

Ancestry of “τετράστῳον”, step by step

τετράστῳον traces back through two separate lines of ancestry.

via Ancient Greek στοά

Step	Language	Word	Meaning
1	Ancient Greek	στοά	a colonnade; a roofed porch or walkway having one...
2	Proto-Hellenic	stōyyā́	—
3	Proto-Indo-European	stoh₂wih₂	—
4	Proto-Indo-European	steh₂-	to stand

via Ancient Greek τετράς

Step	Language	Word	Meaning
1	Ancient Greek	τετράς	the number four; tetrarchy; four-leaved pamphlet,...
2	Proto-Indo-European	kʷetwóres	four
3	Proto-Indo-European	kʷe-	and

Words derived from “τετράστῳον”

tetrastoon

Every word from Proto-Indo-European steh₂- →Every word from Proto-Indo-European stoh₂wih₂ →Every word from Proto-Hellenic stōyyā́ →