| vigilant(adjective, understanding, keen, sensible, certain) |
| well-advised(adjective, sensible, wise, shrewd) |
| well informed(expression, adjective, idiom, knowledge, experience) |
| well read(expression, adjective, idiom, knowledge, experience) |
| wise to(expression, adjective, understanding, cool, keen) |
| worldly-wise(sensible, familiar, wise, knowledgeable, shrewd) |
| coached(familiar, knowledgeable, learned, well-informed, well-read) |
| acquainted with(verb, expression, phrasal verb, knowledge, familiar) |
| adept(adjective, familiar, knowledgeable) |
| aesthetic(adjective, understanding, keen, sensible, certain) |
| alive(adjective, cool, sensible, alert, familiar) |
| alive to(verb, expression, adjective, phrasal verb, understanding) |
| all ready |
| all set |
| all there(expression, adjective, sound, reasonable, rational) |
| apperceptive(adjective, understanding, keen, sensible, certain) |
| appraised(adjective, alert, familiar, wise, knowledgeable) |
| appropriate |
| armed |
| armed and ready(expression, idiom) |