| anxious(adjective, kind, keen, friendly, alert) |
| crafty(adjective, smooth, reasonable, sharp, smart) |
| untrusting |
| on the ball(expression, adjective, idiom, keen, sharp) |
| astute(adjective, kind, smart, sensible, careful) |
| awake(adjective, careful, restless, cautious, disturbed) |
| aware(adjective, kind, keen, friendly, sensible) |
| nervous(adjective, modest, humble, hesitant, suspicious) |
| noncommittal(adjective, restrained, decide, vague, hesitant) |
| open-eyed(adjective, keen, sharp, alert, careful) |
| provident(adjective, close, mean, sensible, deliberate) |
| skeptical(adjective, suspicious, mistrustful, distrustful, disbelieving) |
| subtle(adjective, smooth, sharp, smart, cunning) |
| uneasy(adjective, cautious, suspicious) |
| wise(adjective, reasonable, sharp, sensible, lively) |
| artful(adjective, smooth, sharp, smart, cunning) |
| clever(adjective, sharp, smart, bright, lively) |
| deliberate(adjective, kind, friendly, alert, polite) |
| delicate(adjective, careful, refined, tactful, diplomatic) |
| designing(adjective, cunning, shrewd, scheming, manipulative) |