| hard-headed |
| hardened(adjective, sophisticated, skilled, experienced, mature) |
| hardheaded |
| having something on the ball(expression, idiom, familiar, sophisticated, knowledgeable) |
| hip |
| humanly |
| hylic |
| in the know(expression, idiom, refined, knowledgeable, qualified) |
| indifferent(adjective, cool, nonchalant, dissatisfied, disappointed) |
| insightful(adjective, cool, significant, intelligent, brilliant) |
| instructed(familiar, sophisticated, knowledgeable, skilled, competent) |
| intended(adjective, cool, smart, significant, intelligent) |
| intentional(adjective, cool, smart, significant, intelligent) |
| intercontinental(adjective, union, universal, worldwide, versatile) |
| internationally |
| interracial(adjective, union, universal, worldwide, versatile) |
| into(refined, practical, cultured, urbane, erudite) |
| inured(skilled, experienced, seasoned) |
| jaded(adjective, cool, indifferent, sophisticated, refined) |
| jet-set(adjective, refined, practical, mature, cultured) |