ὅπλον μέγιστόν ἐστιν ἡ ἀρετή βροτοῖς → man's greatest weapon is virtue, virtue is the greatest weapon for mortals
οὖσα, ὄν;part. prés. de εἰμί.
including the feminine ousa; and the neuter on present participle of εἰμί; being: be, come, have.
ὤν: οὖσα, ὄν part. praes. к εἰμί.