1. Able to make or detect effects of great subtlety; sensitive; SYN. fine.
2. Having or revealing keen insight and good judgment.
3. Unobtrusively perceptive and sympathetic; SYN. discreet.
apprehensive · clear · clear-eyed · clear-sighted · critical · discreet · discriminating · perceptive · percipient · perspicacious · prescient · tactful