| frustrated(adjective, arouse bad feelings) |
| gainless(adjective, dry, idle, product, useless) |
| going nowhere(expression, adjective, silly, stupid, insignificant) |
| ignoble(adjective, poor, base, inferior, insignificant) |
| illogical(adjective, strange, fantastic, irregular, improper) |
| in vain(adjective, unsuccess) |
| in vicious circle(expression, adjective, idiom, silly, stupid) |
| inactive |
| inapropos(adjective, strange, fantastic, irregular, improper) |
| incapable |
| incongruent(adjective, strange, fantastic, irregular, improper) |
| indecisive(weak, inferior, inadequate, feeble, useless) |
| innocuous(inferior, inadequate, limited, feeble, useless) |
| insubstantial |
| irregular(adjective, strange, fantastic, improper, odd) |
| jejune |
| jumbled(adjective, strange, fantastic, irregular, improper) |
| lame(inferior, inadequate, limited, feeble, useless) |
| limited(inferior, inadequate, feeble, useless, vain) |
| low-value |