shrewd

adj 1: 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" [syn: {astute}, {sharp}]

2: used of persons; "the most calculating and selfish men in

the community" [syn: {calculating}, {calculative}, {conniving},

{scheming}]