| spineless |
| stony(adjective, mean, hard, cool, unpleasant) |
| supine(adjective, cold, dead, apathy, passive) |
| tasteless |
| toneless(adjective, temper, cold, negative, behave) |
| tough(adjective, mean, hard, cool, unpleasant) |
| unadmiring(adjective, temper, cold, negative, behave) |
| unaffected(adjective, temper, cold, negative, behave) |
| uncompassionate(adjective, mean, hard, cool, unpleasant) |
| uncongenial(adjective, mean, hard, cool, unpleasant) |
| undecided(adjective, cool, weak, uncertain, doubtful) |
| undetermined(adjective, weak, uncertain, doubtful, hesitant) |
| uneager |
| unfeeling(adjective, mean, hard, cool, unpleasant) |
| unfriendly |
| unimportant(adjective, cold, dead, apathy, passive) |
| unimpressed |
| uninspiring(adjective, dull, weak, mild, feeble) |
| unkind(adjective, mean, hard, cool, unpleasant) |
| unpitying(adjective, mean, hard, cool, unpleasant) |