capsize

• capsise (obsolete)

Attested since 1788 CE. Origin unknown. Possibly related to Spanish chapuzar (“to sink by the head”).

• IPA^(key): /kæpˈsaɪz/

capsize (third-person singular simple present capsizes, present participle capsizing, simple past and past participle capsized)

1. (intransitive, nautical) To overturn.
2. (transitive, nautical) To cause (a ship) to overturn.
   • Byron

     But what if carrying sail capsize the boat?

3. (intransitive, of knots) To deform under stress.
   • 1944, Clifford Warren Ashley, The Ashley Book of Knots‎, page 19:

     There are even cases where a totally different knot may result when carelessly pulled. Tie the Granny Knot around any object and pull one end, and it will capsize into Two Half Hitches.

• keel over
• turn turtle

• capsized
• capsizer

• “capsize” in Douglas Harper, Online Etymology Dictionary, 2001–2019.