| Date: | 1300-1400 |
| Language: | Old French |
| Origin: | fondrer, from Latin fundus 'bottom' |
1 to fail after a period of time because something has gone wrong :
Their marriage began to founder soon after the honeymoon.
Their marriage began to founder soon after the honeymoon.2TTW if a ship or boat founders, it fills with water and sinks
founder on
The ship foundered on the rocks.
The ship foundered on the rocks.