capsize
definition
to overturn or tip over a boat or vessel
example
If too many people try to board the small boat at once, it could easily capsize in the rough waters.
synonyms
overturntip overupend
word origin — The word 'capsize' comes from the late 16th century, derived from the words 'cap' meaning 'to cover' or 'to put on', and 'size,' meaning 'to fall' or 'to fall over.'