duffer¹ /dufˈər/

1. An unskilful or worthless person (informal)
2. A fogey, a useless old fellow (informal)
3. A counterfeit coin
4. An unproductive mine

• exuberances
• exuberancies
• exuberancy
• exuberant
• exuberantly
• exuberate
• exuberated
• exuberates
• exuberating
• exudate
• exudates
• exudation
• exudations
• exudative
• exude
• exuded
• exudes
• exuding
• exul
• exulcerate
• exulcerated
• exulcerates
• exulcerating
• exulceration
• exulcerations