| used to(expression, adjective, plain, common, familiar) |
| conversant(adjective, familiar, knowledgeable, aware, savvy) |
| up on(expression, adjective, familiar, knowledgeable, witting) |
| versed in(expression, adjective, familiar, knowledgeable, witting) |
| abreast(adjective, familiar, knowledgeable, aware, savvy) |
| acquainted(adjective, familiar, knowledgeable, aware, savvy) |
| apprised(adjective, familiar, knowledgeable, witting, aware) |
| au courant(expression, adjective, familiar, knowledgeable, aware) |
| au fait(expression, adjective, familiar, knowledgeable, aware) |
| authoritative |
| aware(adjective, familiar, knowledgeable, witting, savvy) |
| cognizant(adjective, familiar, knowledgeable, witting, aware) |
| conscious(adjective, familiar, knowledgeable, witting, aware) |
| expert |
| familiar(adjective, knowledgeable, witting, savvy, go-go) |
| friendly |
| grounded(adjective, familiar, knowledgeable, witting, aware) |
| in on(expression, adjective, familiar, knowledgeable, witting) |
| in the know(expression, adjective, idiom, familiar, knowledgeable) |
| informed(adjective, familiar, knowledgeable, aware, savvy) |