Pou sto

·add. ·- A place to stand upon; a locus standi; hence, a foundation or basis for operations.

sto
sto, stĕti, stătum, 1 (scanned stĕtĕrunt, Verg. A. 2, 774; 3, 48; Ov. H. 7, 166; Prop. 2, 8, 10), v....

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
sto
stō stetī (steterunt for stetērunt, V., O., Pr.), status, āre STA-, to stand, stand still, remain ...

An Elementary Latin Dictionary