| citified(adjective, cool, refined, practical, mature) |
| civilized(adjective, familiar, knowledgeable, informed) |
| cognisant |
| competent(adjective, familiar, sophisticated, knowledgeable, skilled) |
| conscientious(adjective, careful, knowledgeable, cautious, aware) |
| conscious of |
| cosmopolitan(adjective, refined, practical, mature, cultured) |
| couth(adjective, cool, refined, practical, mature) |
| crafty(adjective, smooth, keen, sharp, smart) |
| cultured(adjective, familiar, refined, knowledgeable, practical) |
| cunning(adjective, smooth, keen, sharp, smart) |
| current |
| cutting(adjective, sharp, smart, intelligent, prudent) |
| cynical(adjective, cool, refined, practical, mature) |
| deep(adjective, sound, sharp, smart, intelligent) |
| discerning(adjective, smooth, keen, sharp, smart) |
| discriminating(adjective, sharp, smart, intelligent, prudent) |
| disenchanted(adjective, refined, practical, cultured, urbane) |
| disillusioned(adjective, cool, refined, practical, mature) |
| down with(expression, adjective, sensible, knowledgeable, witting) |