| know ins and outs(expression, adjective, idiom, decent, adequate) |
| know the answers(expression, adjective, idiom, decent, adequate) |
| know the ropes(verb, expression, adjective, idiom, understand) |
| know well |
| know what's what |
| knowing(adjective, alert, familiar, wise, knowledgeable) |
| knowledgeable(adjective, alert, familiar, wise, skilled) |
| latched on(expression, adjective, alert, familiar, wise) |
| learned(adjective, knowledgeable, witting, aware, informed) |
| mindful(adjective, alert, familiar, wise, knowledgeable) |
| no slouch(expression, adjective, decent, adequate, qualified) |
| on the ball(expression, adjective, idiom, decent, adequate) |
| on the beam(expression, adjective, idiom, alert, familiar) |
| on to(expression, adjective, alert, familiar, wise) |
| on top of(expression, adjective, idiom, informed, learned) |
| perceptive(adjective, alert, familiar, wise, knowledgeable) |
| pertinent(adjective, decent, knowledgeable, adequate, qualified) |
| plugged in(expression, adjective, alert, familiar, wise) |
| polished(adjective, decent, knowledgeable, adequate, qualified) |
| posted(adjective, knowledgeable, aware, informed, learned) |