Washout
Washout , noun
1.
The washing out or away of earth, etc., especially of a portion of the bed of a road or railroad by a fall of rain or a freshet; also, a place, especially in the bed of a road or railroad, where the earth has been washed away.
2.
a complete failure; -- of an enterprise.
3.
a person who has failed a course of study or training, leaving the program before its completion.