| hip(adjective, cool, pleasant, moderate, appropriate) |
| wise(adjective, smart, shrewd, clever, subtle) |
| aware(adjective, familiar, knowledgeable, skilled, experienced) |
| knowing(adjective, smart, familiar, shrewd, clever) |
| hip to(expression, adjective, knowledgeable, compatible) |
| canny(adjective, smart, shrewd, clever, artful) |
| in the know(expression, adjective, idiom) |
| informed(adjective, familiar, knowledgeable, skilled, experienced) |
| knowledgeable(adjective, familiar, skilled, experienced, up-to-date) |
| au courant(expression, adjective, familiar, knowledgeable, skilled) |
| au fait(expression, adjective, familiar, knowledgeable, skilled) |
| aware of(expression, adjective, knowledgeable, compatible, attuned) |
| cognizant(adjective, familiar, knowledgeable, skilled, experienced) |
| conversant(adjective, sympathetic, familiar, knowledgeable, witting) |
| groovy |
| learned(adjective, familiar, knowledgeable, skilled, aware) |
| nimble-witted(adjective, smart, shrewd, clever, subtle) |
| on the beam(expression, adjective, idiom, fair, agreeable) |
| quick(adjective, smart, shrewd, clever, subtle) |
| quick-witted(adjective, smart, shrewd, clever, subtle) |