KEY: Irrecoverable.
SYN: Past, hopeless, lost, irredeemable.
ANT: Hopeful, saved, redeemable.

• Invert
• Investigate, [See EXAMINE]
• Investigation
• Investiture
• Investment, [See INVESTITURE]
• Invest, [See DIVEST]
• Inveterate
• Invidious
• Invigorate, [See ENERVATE]
• Invincible
• Inviolable
• Inviolate
• Invisible
• Invisible, [See SELFISH]
• Invite
• Inviting
• Invoke
• Involuntary, [See AMPLE_and_BROAD]
• Involution
• Involve
• Involved
• Invulnerable, [See VULNERABLE]
• Inward
• Iota
• {[IQental]?}