impracticable (adj.)

• awkward
• disadvantageous
• impossible
• impractical
• inapplicable
• inconvenient
• infeasible
• nonfunctional
• troublesome
• unacceptable
• unachievable
• unattainable
• undesirable
• unfeasible
• unfit
• unrealizable
• unsatisfactory
• unserviceable
• unsuitable
• unusable
• unworkable
• useless