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ἰών

Γελᾷ δ' ὁ μωρός, κἄν τι μὴ γέλοιον ᾖ -> The fool laughs even when there's nothing to laugh at
Menander

German (Pape)

[Seite 1278] ἴωνγα, = ἐγώ, w. m. s.

French (Bailly abrégé)

1ἰοῦσα, ἰόν;
part. prés. de εἶμι.
2béot. c. ἐγών.

Russian (Dvoretsky)

ἰών: ἰοῦσα, ἰόν part. praes. к εἶμι.