| ungenial |
| unneighborly(cool, cold, sensitive, shy, unfriendly) |
| unsocial(adjective, cool, cold, modest, nervous) |
| uppity(cool, cold, sensitive, shy, unfriendly) |
| upside-down |
| upside down |
| wrong side out(expression, idiom) |
| afraid(adjective, modest, humble, hesitant, suspicious) |
| alone(private, singular, lonely, unsociable) |
| altered |
| antagonistic(cool, cold, sensitive, shy, unfriendly) |
| averse(adjective, modest, humble, hesitant, suspicious) |
| chary(adjective, modest, humble, hesitant, suspicious) |
| circumspect(adjective, modest, humble, hesitant, suspicious) |
| clammed up(expression, reserved, reticent, uncommunicative) |
| cloistered(private, alone, singular, lonely, unsociable) |
| close(reserved, reticent, uncommunicative) |
| close-mouthed(adjective, reserved, reticent, reclusive, uncommunicative) |
| companionless(private, alone, singular, lonely, unsociable) |
| curt(reserved, reticent, uncommunicative) |