foundering

/F AW1 N D ER0 IH0 NG/
verb
  1. 1

    Of a ship, to fill with water and sink.

  2. 2

    To fall; to stumble and go lame, as a horse.

  3. 3

    To fail; to miscarry.

  4. 4

    To cause to fill and sink, as a ship.

  5. 5

    To disable or lame (a horse) by causing internal inflammation and soreness in the feet or limbs.

noun
  1. 1

    The act by which a vessel founders.

Source: https://en.wiktionary.org/wiki/founder, https://en.wiktionary.org/wiki/foundering