| astute(adjective, smooth, keen, sharp, smart) |
| at home with(expression, adjective, idiom, familiar, knowledgeable) |
| awake to |
| battle-scarred |
| be up on(adjective, careful, knowledgeable, cautious, aware) |
| been there(expression, adjective, familiar, sophisticated, knowledgeable) |
| behind the curtain(expression, idiom) |
| behind the scenes(expression, idiom) |
| bookish(adjective, sound, knowledgeable, cultured, learned) |
| bored(adjective, refined, practical, cultured, urbane) |
| brainy(adjective, smooth, keen, sharp, smart) |
| briefed(adjective, knowledgeable, aware, informed, learned) |
| broken in(expression, adjective, familiar, sophisticated, knowledgeable) |
| cagey(adjective, smooth, keen, sharp, smart) |
| calculating(adjective, smooth, keen, sharp, smart) |
| canny(adjective, smooth, keen, sharp, smart) |
| capable(adjective, familiar, sophisticated, knowledgeable, skilled) |
| careful(adjective, cautious, aware, attentive, wary) |
| cautious(adjective, careful, knowledgeable, aware, attentive) |
| chary(adjective, careful, knowledgeable, cautious, aware) |