irrecoverable (adj.)

• ago
• antiquated
• antique
• by
• bygone
• bypast
• dated
• dead
• deceased
• defunct
• departed
• elapsed
• expired
• extinct
• finished
• forgotten
• gone
• incorrigible
• incurable
• inoperable
• irreclaimable
• irredeemable
• irremediable
• irreparable
• irretrievable
• irreversible
• irrevocable
• lapsed
• lost
• obsolete
• over
• passe
• passed
• past
• ruined
• terminal
• undone
• unmitigable
• vanished