inexpiable /in-ekˈspi-ə-bl/

1. That cannot be expiated or atoned for
2. That cannot be appeased

• airdrop
• airdrops
• air-dry
• air-drying
• aired
• Airedale
• Airedale terrier
• air-engine
• air-engines
• airer
• airers
• airfield
• airfields
• air filter
• air filters
• airflow
• airflows
• airfoil
• airfoils
• air force
• air-force
• Air Force
• air-force blue
• air forces
• airframe