undrown

un- +‎ drown

undrown (third-person singular simple present undrowns, present participle undrowning, simple past and past participle undrowned)

1. (rare, transitive) To remove the water from (something drowned or flooded); to unflood.
   • 1956, Helen Marie Newell, The Hardhats, page 210:

     All available pumps were put into action to undrown the fifty-acre working area behind it.

   • 1971, George Finiel Adams, Jerome Wyckoff, Landforms, page 143:

     Recent uplift of the Maine and Oregon coasts has not been enough to "undrown" the larger valleys; the shorelines are still submergent.

• run down, run-down, rundown