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

• feateously
• feather
• feather bed
• featherbed
• featherbedded
• featherbedding
• featherbeddings
• feather beds
• featherbeds
• feather-boarding
• feather-bonnet
• feather-bonnets
• feather-brain
• feather-brained
• feather-brains
• feather cut
• feather cuts
• feather duster
• feather dusters
• feathered
• feathered friend
• feather-edge
• feather-edges
• feather-grass
• feather-head