sagacious
Cross references: 1. shrewd sa.ga.cious \s*-'ga--sh*s, sig-'a--\ aj [L sagac-, sagax sagacious; akin to L sagire to perceive keen]ly - more at SEEK obs 1: keen in sense perception 2a: of keen and farsighted penetration and judgment : DISCERNING <(~ judge of character} 2b: caused by or indicating acute discernment {~ purchase of stock } - sa.ga.cious.ly av