the.com/capsize
The boat's dramatic decision to swap its top and bottom without consulting you.
means To overturn a boat or vessel in the water, flipping it upside down.
from Surfaced in 18th-century English, likely from Spanish capuzar, to sink a ship by the head — nautical chaos with a Latin pedigree.
Top heavyMost capsizes come from weight too high, not waves.
Self-rightingLifeboats are built to flip back upright alone.
Word twinCap once meant head, hence going head-over-keel.