| worldly-wise(adjective, cool, reasonable, smart, sensible) |
| able to recognize(expression, adjective, idiom, understanding, keen) |
| acquainted(adjective, understanding, keen, sensible, certain) |
| acute(keen, smart, careful, shrewd, clever) |
| adroit(smart, shrewd, clever, subtle, artful) |
| aesthetic(adjective, understanding, keen, sensible, certain) |
| afraid(adjective, upset, excited, anxious, nervous) |
| aghast(adjective, upset, excited, anxious, nervous) |
| alerting |
| all eyes |
| antsy(adjective, upset, excited, anxious, nervous) |
| apperceptive(adjective, understanding, keen, sensible, certain) |
| apprised(adjective, understanding, keen, sensible, certain) |
| aroused(adjective, conscious, wide-awake, wakeful) |
| assured(adjective, understanding, keen, sensible, certain) |
| astute(adjective, understanding, cool, smart, significant) |
| attend |
| au courant(expression, adjective, understanding, keen, sensible) |
| aux aguets |
| avaricious(close, mean, frugal, economical, parsimonious) |