| sharp-eyed(adjective, correct, alert, intelligent, attentive) |
| shrewd |
| suspicious(adjective, cautious, wary, watchful) |
| understanding(adjective, kind, keen, sensible, enthusiastic) |
| wise to(expression, understanding, keen, sensible, certain) |
| accommodating(adjective, understanding, kind, sympathetic, polite) |
| acquainted(adjective, understanding, keen, sensible, certain) |
| all ears(expression, considerate, responsive, aware, helpful) |
| apperceptive(adjective, understanding, keen, sensible, certain) |
| awake to(verb, phrasal verb, attention) |
| cagey(adjective, cautious, aware, attentive, suspicious) |
| canny(adjective, kind, friendly, polite, shy) |
| caring(adjective, understanding, kind, friendly, polite) |
| cognizant of(expression, adjective, knowledgeable, savvy, conversant) |
| complaisant(adjective, understanding, kind, sympathetic, polite) |
| comprehending(correct, alert, intelligent, perceptive, attentive) |
| considering(adjective, correct, alert, intelligent, perceptive) |
| cool(adjective, understanding, kind, deliberate, alert) |
| devoted(kind, loving, worried, considerate, responsive) |
| duteous(attentive, observant) |