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

• meanes
• meanest
• mean free path
• meanie
• meanies
• meaning
• meaningful
• meaningfully
• meaningless
• meaninglessly
• meaninglessness
• meaningly
• meanings
• mean lethal dose
• mean lethal doses
• meanly
• meanness
• meannesses
• means
• mean sea level
• mean solar time
• mean-spirited
• mean-spiritedness
• means test
• means-test