sagacious

adjective

they were sagacious enough to avoid any outright confrontation:

wise, clever, intelligent, with/showing great knowledge, knowledgeable, sensible, sage;

discerning, judicious, canny, penetrating, perceptive, acute, astute, shrewd, prudent, politic, thoughtful, full of insight, insightful, percipient, perspicacious, philosophical, profound, deep;

informal streetwise;

rare sapient.

▷antonyms stupid, foolish.