Hull
Ship Hull
noun
A boat's body is called the hull.
せんたい
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
船体にらくがきをしたのはだれだ！？
Who graffitied the hull?
クラーケンがしょく手で船体をつきやぶったんだ。
The kraken smashed its tentacles through the ship's hull.
船体は思った以上に大きかった。
The hull was bigger than I thought.