verb intranssaid of a ship: to sinksaid of e.g. a plan, project, or arrangement: to failto collapse or give waysaid of a horse: to stumble or go lame verb transto disable or lame (e.g. a horse), esp by overwork [Middle English foundren to send to the bottom, collapse, from early French fondrer, ultimately from Latin fundus bottom]founder or flounder? See note at flounder2