| perceptive(adjective, understanding, cool, sensible, familiar) |
| percipient(adjective, understanding, keen, sensible, certain) |
| plugged in(expression, adjective, cool, sensible, familiar) |
| recognizing(adjective, understanding, keen, sensible, certain) |
| remarking(adjective, understanding, keen, sensible, certain) |
| responsive(adjective, understanding, keen, sensible, certain) |
| savvy(adjective, understanding, cool, sensible, familiar) |
| seeing(adjective, understanding, keen, sensible, certain) |
| sensible(adjective, understanding, keen, certain, alert) |
| sensitive to(expression, adjective, understanding, keen, sensible) |
| supraliminal(adjective, understanding, keen, sensible, certain) |
| sure(adjective, understanding, keen, sensible, certain) |
| switched on(expression, adjective, cool, familiar, groovy) |
| tuned in(expression, adjective, understanding, cool, sensible) |
| turned on(expression, adjective, cool, familiar, groovy) |
| understanding(adjective, keen, sensible, certain, alert) |
| up(adjective, familiar, knowledgeable, aware, savvy) |
| up on(expression, adjective, cool, sensible, familiar) |
| versant(adjective, familiar, knowledgeable, witting, aware) |
| versed(adjective, cool, sensible, familiar, knowledgeable) |