Synonyms for Sagacious:

adj.

clairvoyant (adjective)
foresighted, intuitive, clairvoyant, prognostic, perceptive, insightful, forseeing, second-sighted, prophetic, provident, prescient, farsighted, discerning.
discriminating (adjective)
discerning.
intelligent (adjective)
cogent, clever, encyclopedic, erudite, knowledgeable, capable, knowing, brainy, intelligent, astute, sophisticated, sharp, intellectual, perspicacious, profound, canny, bright, smart, gifted, brilliant, wise, worldly, Comprehending, genius.
sagacious (adjective)
intelligent, brilliant, adept, intellectual, master, scholarly, authoritative, expert, wise, philosophic, genius.
smart, judicious (adjective)
insightful, perspicacious, intelligent, astute, wise, canny, sensible, perceptive, sage, knowing, sharp, prudent, discerning, witty, sapient, rational, clever, knowledgeable.
visionary (adjective)
foresighted.

n.

able, quick, academic, witty. rational, judicious, sensible. sage. reasonable, commonsensical, balanced, reason, sane, well-founded, commonsensible, levelheaded, well-grounded, sound, prudent. sagacious (noun)
perspicacious, sapient, politic, wise.

Other synonyms:

commonsensible, levelheaded, commonsensical, well-grounded. well-founded. balanced, prudent. reasonable. sensible. sensible
sane.
Other relevant words:
levelheaded, reasonable, politic, balanced, well-grounded, commonsensible, sound, rational, sapient, prudent, well-founded, sage, judicious, witty, sensible, sane, commonsensical, quick.

Usage examples for sagacious

  1. 9. Why dost thou suppose, sagacious maiden! – The Elder Eddas of Saemund Sigfusson; and the Younger Eddas of Snorre Sturleson by Saemund Sigfusson and Snorre Sturleson
  2. So the Marquis could only feel sagacious and utter a hint or two before the ladies which fell the more short, since he was persuaded, by Eleanor's having been the foremost in the defence, that she was the object of the quest; and he now and then treated her to hints which she was slow to understand, but which exasperated while they amused her sister. – Two Penniless Princesses by Charlotte M. Yonge
  3. To be reduced to skin and bone by the downright friendship of the world was, as the sagacious reader will admit, next to a miracle. – Stories by English Authors: Ireland by Various