downflood

Blend of down +‎ flood

• (General American) IPA^(key): /ˈdaʊn.flʌd/

• Audio (US):

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downflood (third-person singular simple present downfloods, present participle downflooding, simple past and past participle downflooded)

1. (nautical, of water or other liquid) To enter a boat, ship, or other vessel through openings that are normally above the waterline.
   • 2017 December 12, National Transportation Safety Board, “2.4.2 Flooding”, in Marine Accident Report: Sinking of US Cargo Vessel SS El Faro, Atlantic Ocean, Northeast of Acklins and Crooked Island, Bahamas, October 1, 2015‎^[1], archived from the original on 15 May 2022, page 194:

     Once seawater flowed down (downflooded) to the fourth deck through the ventilation trunks and their unsecured (open) closures, the vessel would have sunk deeper because of the weight of the added water and rolled more easily as it lost its residual righting arm.