| imprudent(silly, foolish, fantastic, unwise, impractical) |
| ineffectual(weak, stupid, idle, useless, incompetent) |
| irrational(silly, foolish, unwise) |
| nonviable(adjective, wild, unreasonable, useless, absurd) |
| not applicable(expression, adjective, silly, impractical, unreal) |
| otherworldly(adjective, wild, unreasonable, useless, absurd) |
| out of the question(adjective, idiom, possible, impossible, impracticable) |
| outlandish(silly, foolish, unwise) |
| outrageous(silly, foolish, fantastic, unwise, impractical) |
| unlikely(adjective, idealistic, improbable) |
| unproductive(adjective, weak, stupid, idle, useless) |
| vain(weak, stupid, idle, useless, incompetent) |
| abortive(weak, stupid, idle, useless, incompetent) |
| bad |
| balmy(silly, foolish, fantastic, unwise, impractical) |
| beyond(adjective, impossible) |
| beyond all reason(expression, idiom, silly, foolish, fantastic) |
| beyond one |
| bizarre(silly, foolish, fantastic, unwise, impractical) |
| broken |