| apprehensive(adjective, cool, sensible, significant, familiar) |
| au courant(expression, adjective, understanding, reasonable, keen) |
| au fait(expression, adjective, idiom, skill, familiar) |
| sentient(adjective, understanding, cool, reasonable, keen) |
| mindful(adjective, understanding, keen, sensible, certain) |
| up(adjective, informal, familiar, knowledgeable, competent) |
| wise(adjective, understanding, cool, reasonable, smart) |
| witting(adjective, understanding, cool, reasonable, keen) |
| accomplished(skill, complex, deep, expert, competent) |
| ambidextrous |
| associating |
| comprehending(adjective, sympathetic, familiar, knowledgeable, witting) |
| experienced(adjective, cool, significant, familiar, intelligent) |
| perceptive(adjective, understanding, cool, sensible, significant) |
| up on(expression, adjective, idiom, knowledge, sensible) |
| versant(adjective, knowledge, familiar, knowledgeable, competent) |
| able(adjective, smart, experience, know, capable) |
| adroit(skill, complex, deep, expert, changeable) |
| at home in(verb, expression, idiom, phrasal verb, knowledge) |
| competent(adjective, cool, smart, experience, significant) |