| strategic(cautious, subtle, tactful, suave, circumspect) |
| streetwise(adjective, smooth, keen, sharp, smart) |
| suspecting(wary, mistrustful, distrustful) |
| Machiavellian |
| able(smart, bright, intelligent, shrewd, clever) |
| active(sharp, bright, lively, alert, aware) |
| adroit(adjective, smart, bright, intelligent, shrewd) |
| alive to(expression, adjective, careful, cautious, aware) |
| all ears(expression, sharp, bright, lively, careful) |
| argute(sharp, smart, intelligent, clever, astute) |
| astucious(smooth, sharp, smart, intelligent, wise) |
| au courant(expression, careful, aware, attentive, wary) |
| awake(alert, cautious, aware, tactful, circumspect) |
| aware(alert, careful, attentive, wary, watchful) |
| backstairs(mysterious, private, reticent, taciturn, covert) |
| be up on(adjective, careful, cautious, aware, attentive) |
| brainy(adjective, good, smooth, keen, sharp) |
| bright(sharp, smart, lively, active, alert) |
| civil(cautious, tactful, circumspect) |
| clammed up(expression, adjective, quiet, reticent, taciturn) |