ὕπνος δεινὸν ἀνθρώποις κακόν → sleep is a terrible evil for humans (Menander, Sententiae monostichoi 1.523)
adj.
P. and V. σώφρων. εὔβουλος, Ar. and P. φρόνιμος; see prudent.
Be discreet, v.: P. and V. σωφρονεῖν.