| shrewd(adjective, understanding, sound, reasonable, sharp) |
| well-rounded(familiar, informed, well-informed) |
| au fait(expression, adjective, familiar, knowledgeable, current) |
| percipient(adjective, understanding, cool, keen, sharp) |
| circumspect(adjective, kind, keen, friendly, alert) |
| discerning(adjective, understanding, cool, sound, reasonable) |
| familiar with(expression, adjective, knowledge, experience, skill) |
| insightful(adjective, understanding, cool, sound, keen) |
| responsive(adjective, understanding, open, kind, keen) |
| savvy(adjective, understanding, cool, keen, sharp) |
| wary(adjective, kind, keen, friendly, sensible) |
| advised(knowledge, familiar, informed, conversant) |
| tuned in(expression, adjective, understanding, cool, keen) |
| canny(adjective, cool, kind, reasonable, friendly) |
| prudent(adjective, kind, sound, reasonable, friendly) |
| reasonable(adjective, sensible, rational, stable, intelligent) |
| smart(adjective, understanding, cool, sound, sharp) |
| wise to(expression, adjective, understanding, cool, keen) |
| with it(expression, adjective, understanding, cool, keen) |
| brainy(adjective, understanding, cool, knowledge, keen) |