νέῳ δὲ σιγᾶν μᾶλλον ἢ λαλεῖν πρέπει → it's fitting for a young man to keep silence rather than to speak (Menander)
aufzäumen, ein Pferd, equum frenare od. infrenare; equo frenum inicere. – sich au. lassen, frenum accipere od. pati.