| keen(adjective, anxious, alert, careful, cautious) |
| listening(adjective, considerate, responsive, aware, helpful) |
| lively(adjective, sharp, bright, attentive) |
| looking for(expression, adjective, keen, alert, careful) |
| looking to(expression, adjective, keen, alert, careful) |
| not missing a trick(expression, adjective, idiom, alert, careful) |
| on alert(expression, adjective, keen, alert, careful) |
| on the alert(expression, adjective, idiom, alert, careful) |
| on the watch(expression, adjective, idiom, alert, careful) |
| on toes(expression, adjective, keen, alert, careful) |
| open-eyed(adjective, keen, anxious, alert, careful) |
| perceptive(adjective, sharp, bright, lively, careful) |
| prepared(adjective, alert, careful, cautious, aware) |
| psyched up(expression, adjective, sharp, bright, lively) |
| quick(adjective, sharp, bright, lively, alert) |
| ready(adjective, sharp, bright, lively, alert) |
| saving(adjective, considerate, cautious, prudent, suspicious) |
| see after(expression, adjective, alert, careful, cautious) |
| see to(expression, adjective, alert, careful, cautious) |
| sharp(adjective, keen, bright, lively, careful) |