| wise(perceptive, observant, insightful) |
| able to recognize(expression, adjective, idiom, understanding, keen) |
| acquainted(adjective, understanding, keen, sensible, certain) |
| aesthetic(adjective, understanding, keen, sensible, certain) |
| alert(adjective, understanding, keen, sensible, certain) |
| alive to(expression, adjective, understanding, keen, sensible) |
| apprehensive |
| apprised(adjective, understanding, keen, sensible, certain) |
| assured(adjective, understanding, keen, sensible, certain) |
| attentive(adjective, understanding, keen, sensible, certain) |
| au courant(expression, adjective, understanding, keen, sensible) |
| awake(adjective, understanding, keen, sensible, certain) |
| certain(adjective, understanding, keen, sensible, alert) |
| cogent |
| cognisant |
| conversant(adjective, understanding, keen, sensible, certain) |
| farseeing |
| farsighted |
| felt(adjective, understanding, keen, sensible, certain) |
| foreseeing |