ἀεὶ δ' ἀρέσκειν τοῖς κρατοῦσιν → always try to please your masters, always be obsequious to the masters
P. and V. σοφιστής, ὁ, or use adj., P. and V. σοφός.
herb: Ar. σφάκος, ὁ.
P. and V. σοφός, Ar. and P. φρόνιμος; see sagacious.
learned: Ar. and P. πολυμαθής.
grave: P. and V. σεμνός.