Source : Webster's Revised Unabridged Dictionary (1913)

Astute \As*tute"\, a. [L. astutus, fr. astus craft, cunning;
   perh. cognate with E. acute.]
   Critically discerning; sagacious; shrewd; subtle; crafty.

   Syn: Keen; eagle-eyed; penetrating; skilled; discriminating;
        cunning; sagacious; subtle; wily; crafty. {As*tute"ly},
        adv. -- {As*tute"ness}, n.

Source : WordNet®

astuteness
     n 1: intelligence manifested by being astute (as in business
          dealings) [syn: {shrewdness}, {perspicacity}, {perspicaciousness}]
     2: the intellectual ability to penetrate deeply into ideas
        [syn: {profundity}, {profoundness}, {depth}]