#Ecumenical derives from the Greek oikoumenikos, meaning “of the whole world” or “universal,” specifically referring to the inhabited world (he oikoumene ge) as known to ancient Greeks.
It traces back to oikoumenos, the present passive participle of oikein (“to inhabit”), from oikos (“house” or “household”), rooted in the Proto-Indo-European woi̯k̑-os for “clan” or “social unit.”




