Ὠδεῖον

From LSJ

τί δὲ βλέπεις τὸ κάρφος τὸ ἐν τῷ ὀφθαλμῷ τοῦ ἀδελφοῦ σου, τὴν δὲ ἐν τῷ σῷ ὀφθαλμῷ δοκὸν οὐ κατανοεῖς → why do you look at the speck of sawdust in your brother's eye and pay no attention to the plank in your own eye | and why beholdest thou the mote that is in thy brother's eye, but considerest not the beam that is in thine own eye | why do you see the speck that is in your brother's eye, but don't consider the beam that is in your own eye

Source

French (Bailly abrégé)

ου (τό) :
l'Odéon, édifice public d'Athènes, primit. destiné aux exercices de chant et affecté, depuis Périclès, à certains services publics (tribunal, assemblées du peuple, etc.).
Étymologie: ᾠδή.