broch¹, also brogh or brough /brohh/

1. A dry-built circular tower of the late Iron Age with galleries in the thickness of the wall, common in Scotland, very rare elsewhere
2. A luminous ring around the moon

• open the ball
• open the door to
• open the floodgates
• open-top
• open-topped
• open town
• open towns
• open university
• open up
• open verdict
• open-weave
• openwork
• openworks
• opepe
• opepes
• opera
• operability
• operable
• opera bouffe
• opera buffa
• opera cloak
• opera cloaks
• opera-dancer
• opera-dancers
• plaquette