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ὦναξ

Γηράσκω δ᾽ αἰεὶ πολλὰ διδασκόμενος -> I grow old always learning many things
Solon the Athenian

French (Bailly abrégé)

selon d’autres ὦ ’ναξ, crase ou élis. poét. et ion. p.ἄναξ.

Russian (Dvoretsky)

ὦναξ: или ὦ ᾽ναξ in crasi или in elisione = ὦ ἄναξ.