Lieutenant
Noun
ちゅうい
我が軍の中尉が敵軍に拉致され、処刑されました。
Our army’s first lieutenant was captured by the enemy and executed.
A military officer who's in the middle of their career has become a first lieutenant.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.