| sharp(smooth, smart, alert, familiar, wise) |
| skillful(adjective, informal, skilled, clever, able) |
| tuned in(expression, smooth, smart, alert, familiar) |
| up(adjective, familiar, knowledgeable, skilled, aware) |
| upon |
| wise to(expression, adjective, alert, familiar, wise) |
| wised up(expression, adjective, smooth, smart, alert) |
| from |
| aboard |
| au courant(expression, alert, familiar, wise, knowledgeable) |
| aware(adjective, informal, alert, familiar, knowledgeable) |
| cognizant(adjective, alert, familiar, wise, knowledgeable) |
| conversant(adjective, familiar, knowledgeable, aware, informed) |
| a |
| able(adjective, smart, skilled, clever, adroit) |
| abreast(adjective, familiar, knowledgeable, skilled, aware) |
| absorbed(adjective, keen, intense, involved, attentive) |
| according |
| across |
| addiction(noun, form, characteristic, rule, thing) |