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

• nail files
• nail gun
• nail guns
• nail-head
• nail-headed
• nail-heads
• nail-head-spar
• nail-hole
• nail-holes
• nailing
• nailings
• nailless
• nail one's colours to the mast
• nail polish
• nail polishes
• nail punch
• nail punches
• nail-rod
• nail-rods
• nails
• nail scissors
• nail set
• nail up
• nail varnish
• nail varnishes