ὤν

From LSJ

τὸ πολὺ τοῦ βίου ἐν δικαστηρίοις φεύγων τε καὶ διώκων κατατρίβομαι → waste the greater part of one's life in courts either as plaintiff or defendant

Source

French (Bailly abrégé)

οὖσα, ὄν;
part. prés. de εἰμί.

English (Strong)

including the feminine ousa; and the neuter on present participle of εἰμί; being: be, come, have.

Russian (Dvoretsky)

ὤν: οὖσα, ὄν part. praes. к εἰμί.