How to Say "hull" in Spanish
The most common Spanish word for “hull” is “casco” — use 'casco' when referring to the main structural body or frame of a ship, boat, or aircraft..
English → Spanish
casco
/kás-koh//ˈkasko/
nounB1
Use 'casco' when referring to the main structural body or frame of a ship, boat, or aircraft.

Examples
El casco del barco necesita reparación después de la tormenta.
The ship's hull needs repair after the storm.
Pintaron el casco del yate de color azul brillante.
They painted the yacht's hull a bright blue color.
cuerpo
/KWER-po//'kweɾpo/
nounB1
Use 'cuerpo' for the main part or substance of something, including the body of a written text, but less commonly for the physical hull of a ship.

Examples
El cuerpo del artículo explica la idea principal.
The body of the article explains the main idea.
El cuerpo de la guitarra es de madera de arce.
The body of the guitar is made of maple wood.
Casco vs. Cuerpo for Ship Hulls
Learners often mistakenly use 'cuerpo' when 'casco' is the correct term for a ship's hull. While 'cuerpo' means 'body', 'casco' is the specific nautical term for the watertight main body of a vessel.
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