Founder

Chamber's Twientieth Century Dictionary · 1908 · p. 41

fownd′ėr, v.i. to go to the bottom: to fill with water and sink.— v.t. to cause to sink: to disable by injuring the feet (of a horse).— adj. Found′erous , causing to founder. [O. Fr. fondrer , to fall in, fond , bottom—L. fundus , bottom.]