| understanding(adjective, keen, sensible, certain, alert) |
| vigilant(adjective, understanding, keen, sensible, certain) |
| watchful(adjective, understanding, keen, sensible, certain) |
| wise to(expression, adjective, understanding, keen, sensible) |
| with it(expression, adjective, understanding, keen, sensible) |
| witting(adjective, understanding, keen, sensible, certain) |
| acute(perceptive, observant, insightful) |
| alive |
| astute(perceptive, observant, insightful) |
| at home with(expression, idiom, witting, versant) |
| being aware(expression, respectful) |
| brainy(perceptive, observant, insightful) |
| deliberate |
| discreet(perceptive, observant, insightful) |
| ear to the ground(expression, idiom, perceptive, observant, insightful) |
| familiar(witting, versant) |
| gnostic(perceptive, observant, insightful) |
| go-go(witting, versant) |
| in the know(expression, idiom, witting, versant) |
| in the picture(expression, idiom, witting, versant) |