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

• bisphenols
• bisphosphonate
• bisphosphonates
• bisque
• bisques
• bissextile
• bissextiles
• bisson
• bistable
• bister
• bisters
• bistort
• bistorts
• bistouries
• bistoury
• bistre
• bistred
• bistres
• bistro
• bistros
• bisulcate
• bisulphate
• bisulphates
• bisulphide
• bisulphides