| bright(adjective, cool, smart, happy, lively) |
| clever(adjective, cool, sound, sharp, smart) |
| erudite(adjective, knowledge, experience, skill, expert) |
| feeling(adjective, understanding, animate, responsive, perceptive) |
| intent(adjective, feature, characteristic, detail, considerate) |
| judicious(adjective, understanding, cool, sound, reasonable) |
| learned(adjective, sound, reasonable, knowledge, sharp) |
| notified |
| on to(expression, adjective, idiom, understanding, cool) |
| rational(adjective, understanding, reasonable, keen, sensible) |
| receptive(adjective, understanding, open, sensible, enthusiastic) |
| sagacious(adjective, understanding, cool, sound, reasonable) |
| understanding(adjective, sound, keen, sharp, smart) |
| well-apprised |
| well-informed(adjective, cool, knowledge, sensible, experience) |
| well-read(adjective, knowledge, experience, skill, expert) |
| observing(adjective, understanding, kind, keen, sensible) |
| on one's toes(expression, adjective, idiom) |
| sage(adjective, understanding, cool, sound, reasonable) |
| sapient(adjective, knowledge, experience, skill, expert) |