Where does “պողոտայ” come from?

պողոտայ (Old Armenian) comes from Classical Syriac ܦܠܛܝܐ, from Ancient Greek πλατεῖα, from Ancient Greek πλατύς, from Proto-Indo-European pléth₂us, from Proto-Indo-European pleth₂- — flat.

պողոտայ (Old Armenian): square; the centre or the chief square of a city;...