verb

Capsize means when a boat or a ship turns over or flips upside down in the water. Just like when you turn a cup upside down, all the contents spill out, when a boat capsizes, everything that was on the boat falls into the water.

Example

1. The storm was so strong that it caused the boat to capsize.
2. The fishermen were lucky to survive after their boat capsized in the rough sea.
3. The rescue team quickly arrived to help the people who were struggling after their boat had capsized.