birr¹ /bûr or bir/ (esp Scot and US)

1. Impetus, force, vigour
2. A violent push (Scot)
3. Emphasis, stress in speaking
4. Any sharp whirring sound

To whirr

• travolators
• trawl
• trawled
• trawler
• trawlerman
• trawlermen
• trawlers
• trawl-fish
• trawl-fishes
• trawling
• trawlings
• trawl-line
• trawl-lines
• trawl-net
• trawl-nets
• trawls
• tray
• T-ray
• traybake
• traybakes
• traybit
• tray cloth
• tray cloths
• trayful
• trayfuls