| tuned in(expression, adjective, careful, knowledgeable, cautious) |
| unsleeping(adjective, keen, anxious, alert, careful) |
| vigilant(adjective, restrained, alert, careful, hesitant) |
| waiting on(expression, adjective, keen, alert, careful) |
| wakeful(adjective, keen, anxious, alert, careful) |
| wary(adjective, keen, restrained, alert, careful) |
| watchful(adjective, keen, restrained, alert, careful) |
| wide-awake(adjective, keen, anxious, alert, careful) |
| with weather eye open(expression, adjective, idiom, keen, careful) |
| calculating(adjective, restrained, hesitant, reserved, cautious) |
| canny(adjective, restrained, hesitant, reserved, cautious) |
| considerate(adjective, judicious, tentative) |
| discreet(adjective, restrained, hesitant, reserved, cautious) |
| forethoughtful(adjective, cautious, judicious, tentative) |
| gingerly(adjective, restrained, hesitant, reserved, cautious) |
| in suspense |
| judicious(adjective, tentative) |
| leery(adjective, restrained, hesitant, reserved, cautious) |
| noncommittal(adjective, restrained, hesitant, reserved, cautious) |
| on the alert(expression, idiom, alert, attentive, watchful) |