| perceptive(adjective, understanding, open, cool, keen) |
| planned(adjective, deliberate, determined, careful, thoughtful) |
| voluntary(adjective, deliberate, determined, careful, thoughtful) |
| purposeful(adjective, deliberate, determined, careful, thoughtful) |
| rational(adjective, understanding, sound, reasonable, keen) |
| watchful(adjective, understanding, cool, keen, sensible) |
| au courant(expression, adjective, idiom, understanding, cool) |
| cognisant(adjective, aware) |
| considered(adjective, deliberate, careful, thoughtful, cautious) |
| conversant(adjective, understanding, cool, reasonable, keen) |
| shy(adjective, quiet, reserved, timid, retiring) |
| well-rounded(familiar, informed, well-informed) |
| heedful(adjective, alert, familiar, careful, wise) |
| keen(adjective, understanding, sharp, fine, smart) |
| observant(adjective, understanding, cool, keen, sharp) |
| responsive(adjective, understanding, open, keen, sharp) |
| self-conscious(adjective, deliberate, affected, artificial, intentional) |
| discerning(adjective, understanding, cool, reasonable, keen) |
| feeling(adjective, understanding, keen, fine, sensible) |
| knowledgeable(adjective, understanding, cool, keen, sharp) |