impolder or empolder /im-pōlˈdər/

To make a polder of

• underperformed
• underperforming
• underperforms
• underpin
• underpinned
• underpinning
• underpinnings
• underpins
• under plain cover
• underplant
• underplanted
• underplanting
• underplants
• underplay
• underplayed
• underplaying
• underplays
• underplot
• underplots
• underpopulated
• under-power
• underpowered
• under-powers
• underpraise
• underpraised