| undemonstrative(adjective, cool, indifferent, restrained, remote) |
| unemotional(adjective, indifferent, restrained, hostile, unfriendly) |
| unfavorable(adjective, mean, nasty, hostile, unfriendly) |
| unforthcoming(adjective, person, feelings) |
| uninterested(adjective, cool, indifferent, restrained, unfriendly) |
| unkind(adjective, mean, nasty, hostile, unfriendly) |
| unpropitious(adjective, mean, nasty, unfriendly, hateful) |
| unresponsive(adjective, cool, indifferent, restrained, unfriendly) |
| unsociable(adjective, mean, cool, nasty, indifferent) |
| unsympathetic(adjective, mean, nasty, unfriendly, hateful) |
| viperous(adjective, mean, nasty, unfriendly, hateful) |
| virulent(adjective, mean, nasty, unfriendly, hateful) |
| vitriolic(adjective, mean, nasty, unfriendly, hateful) |
| warlike(adjective, mean, nasty, unfriendly, hateful) |
| acrimonious(adjective, hard, angry, offended, indignant) |
| aggrieved(angry, offended, indignant) |
| antagonistic(adjective, mean, nasty, unfriendly, contrary) |
| brusque(adjective, hostile, unfriendly, standoffish, unfavorable) |
| cable |
| crisp |