| unclouded |
| vigilant(adjective, understanding, cool, keen, sensible) |
| watchful(adjective, understanding, cool, keen, sensible) |
| well-advised(adjective, sound, sensible, rational, intelligent) |
| witting(adjective, understanding, cool, keen, sensible) |
| able to recognize(expression, adjective, idiom, understanding, keen) |
| abreast(adjective, familiar, knowledgeable, skilled, aware) |
| acquainted(adjective, understanding, keen, sensible, certain) |
| advisable(adjective, sound, sensible, rational, intelligent) |
| aesthetic(adjective, understanding, keen, sensible, certain) |
| alive to(expression, adjective, understanding, keen, sensible) |
| all-knowing |
| all there(expression, adjective, sound, sensible, sympathetic) |
| analytical(reasoning, intellectual, mental) |
| apprehending |
| apprised(adjective, understanding, keen, sensible, certain) |
| apt |
| arguable(adjective, sound, sensible, rational, intelligent) |
| argute |
| artful |