trisagion /tri-sagˈi-on/

1. An ancient hymn consisting of the words ‘O Holy God, holy and mighty, holy and immortal, have mercy on us’
2. Loosely, the Tersanctus

• airer
• airers
• airfield
• airfields
• air filter
• air filters
• airflow
• airflows
• airfoil
• airfoils
• air force
• air-force
• Air Force
• air-force blue
• air forces
• airframe
• airframes
• air freight
• air-freight
• air-freighted
• air-freighting
• air freights
• air-freights
• air frost
• airgap