1. Incapable of being recovered or regained
   - unrecoverable

See also: irretrievable, lost, unretrievable

• courtesy
• courthouse
• courtier
• courting
• courtliness
• courtly
• courtly love
• courtroom
• courtship
• courtyard
• couscous
• cousin
• cousin brother
• cousin sister
• cousin-german
• cousinhood
• cousinly
• Cousteau
• couth
• couthie
• couthy
• couture
• couturier
• couvade
• couverture