| stern(adjective, mean, severe, harsh, cruel) |
| uncooperative(adjective, irritable, sullen, crabby, cranky) |
| uncordial(adjective, hard, tough, severe, cold) |
| ungenial(adjective, sullen) |
| unhelpful(adjective, difficult, unfriendly, bad-tempered, abrupt) |
| unmannerly(adjective, rough, rude, coarse, polite) |
| unsympathetic(adjective, mean, hard, tough, severe) |
| vile(adjective, mean, bad, wrong, evil) |
| violent(adjective, unpleasant, horrible, hostile, disagreeable) |
| vulgar(rude, coarse, sullen, boorish) |
| warlike(adjective, mean, nasty, cold, unfriendly) |
| acerb |
| acidulous |
| acrid(tough, harsh, awkward, grumpy, bad-tempered) |
| adamant(adjective, mean, harsh, cruel, vicious) |
| adust(adjective, sadness, gloom, unclear, morose) |
| alien(adjective, mean, nasty, cold, unfriendly) |
| anesthetized(adjective, hard, tough, severe, cold) |
| annoyed(adjective, hurt, cross, short, irritable) |
| anti(adjective, mean, nasty, unfriendly, hateful) |