| informed of(verb, phrasal verb, knowledge) |
| judicious(adjective, understanding, sensible, knowledgeable, perceptive) |
| keen(adjective, understanding, sensible, certain, alert) |
| keep company with(verb, phrasal verb, friendship, sociality) |
| kept posted(expression, adjective, familiar, knowledgeable, skilled) |
| know-how(adjective, alert, familiar, wise, knowledgeable) |
| know the score(expression, idiom, alert, familiar, wise) |
| known(adjective, understanding, keen, sensible, certain) |
| latched on(expression, alert, familiar, wise, knowledgeable) |
| lettered(adjective, familiar, informed, learned, educated) |
| make acquaintance with(verb, phrasal verb, friendship, sociality) |
| met |
| no stranger to(verb, expression, adjective, idiom, phrasal verb) |
| noticing(adjective, understanding, keen, sensible, certain) |
| observant(adjective, understanding, sensible, knowledgeable, perceptive) |
| observing(adjective, understanding, keen, sensible, certain) |
| omniscient(adjective, familiar, informed, learned, educated) |
| on visiting terms(expression, idiom, sociality) |
| perceiving(adjective, understanding, keen, sensible, certain) |
| percipient(adjective, understanding, keen, sensible, certain) |