capsize

UK: /kæpˈsaɪz/ US: /ˈkæpsaɪz/ ,(kap′sīz, kap sīz′)

Inflections of 'capsize' (v): (⇒ conjugate)

capsizes

v 3rd person singular

capsizing

v pres p

capsized

v past

capsized

v past p

WordReference Random House Learner's Dictionary of American English © 2025

cap•size /ˈkæpsaɪz/   v., -sized, -siz•ing. 

1. to turn bottom up;
   overturn: [no obj]:
   The boat capsized.
   [ ~ + obj]:
   The wind capsized their boat.

cap•siz•a•ble, adj. 

WordReference Random House Unabridged Dictionary of American English © 2025

cap•size  (kap′sīz, kap sīz′), v.i., v.t. -sized, -siz•ing. 

1. to turn bottom up;
   overturn:
   The boat capsized.
   They capsized the boat.

• origin, originally uncertain 1780–90

cap′siz•a•ble, adj. 
Synonyms

See upset. 

Antonyms

right.

Collins Concise English Dictionary © HarperCollins Publishers::

capsize / kæpˈsaɪz/ verb

1. to overturn accidentally; upset

Etymology: 18th Century: of uncertain origin