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

• bandymen
• bane
• baneberries
• baneberry
• baned
• baneful
• banefully
• banefulness
• banefulnesses
• banes
• bang
• Bangalore torpedo
• banged
• banger
• bangers
• bang for one's buck
• bang goes
• bangin'
• banging
• Bangla
• bangle
• bangled
• bangles
• bang off
• bang on