inoperable (adj.)

• gone
• impracticable
• impractical
• inapplicable
• incorrigible
• incurable
• inoperative
• insuperable
• insurmountable
• irreclaimable
• irrecoverable
• irredeemable
• irremediable
• irreparable
• irretrievable
• irreversible
• irrevocable
• lost
• nonfunctional
• otiose
• ruined
• terminal
• unachievable
• unattainable
• undoable
• undone
• unemployable
• unfit
• unhelpful
• unmitigable
• unrealizable
• unsuitable
• unsurmountable
• unusable
• unworkable