| tied |
| tuned in(expression, adjective, sensible, alert, familiar) |
| abreast(adjective, familiar, knowledgeable, aware, savvy) |
| abstruse(knowledgeable, cultured, educated, erudite, enlightened) |
| academic(knowledgeable, cultured, educated, erudite, enlightened) |
| accomplished(knowledge, knowledgeable, cultured, educated, erudite) |
| alert(adjective, familiar, wise, knowledgeable, responsive) |
| alive(adjective, sensible, alert, familiar, wise) |
| appraised(adjective, alert, familiar, wise, knowledgeable) |
| appreciative(adjective, alert, familiar, wise, knowledgeable) |
| ashore |
| at home with(expression, adjective, idiom, familiar, knowledgeable) |
| attentive(adjective, alert, familiar, wise, knowledgeable) |
| au fait(expression, adjective, familiar, knowledgeable, aware) |
| backgrounded |
| base |
| bedfast(adjective, restrained, limited, witting, restricted) |
| bedridden(adjective, restrained, limited, restricted, captive) |
| bookish(knowledge, knowledgeable, cultured, educated, erudite) |
| bottled up(expression, adjective, restrained, limited, restricted) |