Having or showing an ability to accurately assess situations or people and turn this to one's advantage
an astute businessman
marked by practical hardheaded intelligence; "a smart businessman"; "an astute tenant always reads the small print in a lease"; "he was too shrewd to go along with them on a road that could lead only to their overthrow"
(astutely) in a shrewd manner; "he invested his fortune astutely"; "he was acutely insightful"
(astuteness) shrewdness: intelligence manifested by being astute (as in business dealings)
(astuteness) the intellectual ability to penetrate deeply into ideas
Two submarines of the Royal Navy have been named HMS Astute for the characteristic of shrewdness and discernment.
quickly and critically discerning; shrewd or crafty