| unpremeditated |
| unproductive(adjective, weak, stupid, idle, useless) |
| unprofitable(adjective, stupid, insignificant, idle, irregular) |
| unprompted |
| unthinking |
| unthought-of |
| unusable(adjective, weak, stupid, idle, useless) |
| unusuable(adjective, weak, stupid, idle, incompetent) |
| unwitting |
| unworkable(adjective, weak, stupid, idle, useless) |
| vacant(adjective, value, insignificant, unimportant, empty) |
| vacuous(adjective, insignificant, irregular, useless, empty) |
| vague(adjective, value, insignificant, unimportant, empty) |
| vain(adjective, value, stupid, insignificant, idle) |
| value(adjective, insignificant, unimportant, empty, vague) |
| valueless(adjective, value, stupid, insignificant, idle) |
| vapid(adjective, value, insignificant, unimportant, empty) |
| wanton(adjective, insignificant, irregular, useless, empty) |
| waste(adjective, weak, stupid, idle, useless) |
| weak(adjective, stupid, idle, useless, incompetent) |