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

• diplomatic services
• diplomating
• diplomatise
• diplomatised
• diplomatises
• diplomatising
• diplomatist
• diplomatists
• diplomatize
• diplomatized
• diplomatizes
• diplomatizing
• diplomatologies
• diplomatology
• diplomats
• diplon
• diplons
• diplont
• diplontic
• diplonts
• diplopia
• diplopias
• diplopod
• Diplopoda
• diplopods