ἐκίνηθεν

From LSJ

νέῳ δὲ σιγᾶν μᾶλλον ἢ λαλεῖν πρέπει → it's fitting for a young man to keep silence rather than to speak (Menander)

Source

French (Bailly abrégé)

3ᵉ pl. ao. Pass. épq. de κινέω.