| acute(adjective, understanding, keen, smart, sensitive) |
| discriminating(adjective, questioning, profound, searching, probing) |
| incisive(adjective, understanding, keen, alert, sensitive) |
| keen(adjective, understanding, sharp, smart, bright) |
| penetrating(adjective, understanding, sharp, smart, bright) |
| piercing |
| sharp(adjective, understanding, keen, smart, sensitive) |
| discerning(adjective, understanding, keen, sharp, smart) |
| knifelike |
| cute(adjective, understanding, sharp, smart, bright) |
| perceptive(adjective, understanding, keen, sharp, smart) |
| sagacious(adjective, understanding, keen, sensitive, perceptive) |
| shrewd(adjective, understanding, sharp, smart, alert) |
| astute(adjective, understanding, keen, sharp, smart) |
| perspicacious(adjective, understanding, keen, sensitive, perceptive) |
| quick-witted(adjective, smart, intelligent, clever, skillful) |
| shrill |
| intense |
| abrupt |
| bully |