| not equal to(expression, idiom, skill, inadequate, unable) |
| not helpful |
| not up to(expression, idiom, skill, inadequate, unfit) |
| null and void(expression, adjective, idiom, inferior, inadequate) |
| of no use(expression, idiom, weak, stupid, idle) |
| pitiful(adjective, mean, obscure, low, miserable) |
| shoddy(insignificant, trivial, ridiculous, worthless, puny) |
| sleeveless |
| strong |
| stupid(adjective, silly, insignificant, idle, useless) |
| thin(adjective, dull, light, weak, soft) |
| toothless(adjective, poor, inadequate, useless, ineffective) |
| unadapted(inadequate, useless, inept, unable, unskilled) |
| unavailable(stupid, idle, inadequate, feeble, useless) |
| unconvincing(adjective, weak, poor, thin, delicate) |
| undependable(adjective, uncertain, nervous, unstable, hesitant) |
| uneconomical(incompetent, wasteful, unproductive) |
| unequipped(inadequate, useless, inept, unable, unskilled) |
| unfitted(skill, inadequate, useless, unfit, unable) |
| unreliable(adjective, uncertain, nervous, unstable, useless) |