burr² or bur /bûr/

1. The rough sound of r pronounced in the throat, as by many Northumberland people
2. A continual humming sound as of a machine

1. To speak with a burr
2. To whisper hoarsely, to murmur

• addicts
• add-in
• adding
• adding machine
• adding machines
• add-ins
• add insult to injury
• addio
• Addison's disease
• additament
• additaments
• addition
• additional
• additionality
• additionally
• additional member system
• addition compound
• addition product
• addition reaction
• additions
• addititious
• additive
• additive-free
• additives
• addle