impolder or empolder /im-pōlˈdər/

To make a polder of

• downfalls
• downflow
• downflows
• downforce
• downforces
• down-going
• down-goings
• downgrade
• downgraded
• downgrades
• downgrading
• down-gyved
• downhaul
• downhauls
• downhearted
• downhill
• downhole
• down-home
• downier
• downiest
• Downie®
• downiness
• downinesses
• downing
• Downing Street