| piercing(adjective, keen, sharp, intelligent, clever) |
| reasonable(adjective, sound, smart, bright, sensible) |
| sensitive(adjective, understanding, keen, sharp, sensible) |
| sound(adjective, reasonable, sensible, intelligent, wise) |
| brilliant(adjective, sharp, smart, bright, sensitive) |
| clear |
| clear-eyed |
| commonsensical(adjective, reasoning, intellectual, mental) |
| crafty(adjective, keen, sharp, smart, sensible) |
| cunning(adjective, sharp, smart, sensible, intelligent) |
| diplomatic(adjective, smooth, sensible, wise, shrewd) |
| erudite(adjective, sensible, intelligent, wise, learned) |
| luminous(adjective, obvious, understandable) |
| understanding(adjective, smart, bright, sensible, sensitive) |
| adroit(smooth, keen, smart, bright, clever) |
| apt(adjective, smart, bright, wise, learned) |
| cagey(adjective, sharp, ability, smart, careful) |
| careful(adjective, smart, sensible, wise, clever) |
| cognizant(perceptive, observant, insightful, intelligence wisdom) |
| comprehending(adjective, smart, bright, intelligent, brainy) |