| instructed(adjective, familiar, sophisticated, knowledgeable, skilled) |
| intellectual(adjective, sound, knowledgeable, cultured, learned) |
| introduced(adjective, familiar, knowledgeable, aware, savvy) |
| jaded(adjective, refined, practical, cultured, urbane) |
| jet-set(adjective, cool, refined, practical, mature) |
| judicious(adjective, smooth, keen, sharp, smart) |
| keen(adjective, smooth, sharp, smart, wise) |
| kept posted(expression, adjective, familiar, knowledgeable, witting) |
| know-how(adjective, alert, familiar, wise, knowledgeable) |
| know all the answers(expression, adjective, idiom, careful, aware) |
| know ins and outs(expression, adjective, idiom, careful, aware) |
| knowing the score(expression, adjective, idiom, sophisticated, knowledgeable) |
| laid-back(adjective, refined, practical, cultured, urbane) |
| latched on(expression, adjective, alert, familiar, wise) |
| learned(adjective, familiar, knowledgeable, competent, witting) |
| let into |
| lettered(adjective, familiar, knowledgeable, informed, experienced) |
| literary(adjective, sound, familiar, informed, cultured) |
| matured(adjective, familiar, sophisticated, knowledgeable, skilled) |
| mindful of |