This unglossed headword, masculine nominative singular or neuter nominative/accusative plural of this present participle, is attested only here. The verb prosani/sxw -- as opposed to prosane/xw: pi 2597 -- is not registered by LSJ and is a great rarity except in the post-Suda Byzantine astronomer Patriarch John X Camaterus (who uses it lavishly), but Cyril of Alexandria has an instance of prosani/sxousi.