• astute, clear, sensible, Sharp-witted, keen, brainy, fast, active, sage, careful, serious, prudent, judicious, ingenious, sagacious, sharp, sane, perceptive, logical, reasonable, full, savvy, quick, grave, gloomy, trained, taught, foxy, brilliant, crafty, somber, sober, experienced, dignified, intellectual, erudite, literate, melancholy, educated, cognizant, sedate, staid, no-nonsense, light, thoughtful, bright, percipient, intelligent, skilled, clever, competent, earnest, cerebral, aware, thinking, apt, discerning, solemn, well-read, knowledgeable, wise, smart, talented, responsible, miserable, heavy, cautious, sound, shrewd, valid, informed, supersmart, rational, acute, wily, nimble, resourceful, knowing, highbrow, learned, cunning, insightful, balanced, perspicacious, sapient, ultrasmart, hyperintelligent, scholarly, severe, steady, filled, quick-witted, schooled.