ξένῳ δὲ σιγᾶν κρεῖττον ἢ κεκραγέναι → it's better for a stranger to keep silence than to shout (Menander)
ἀπερίσκεπτος, ἄβουλος, ἀσύννοος, ἀσύννους, νεανικός