This is the 13386th most frequent Korean word.
땅굴
"땅굴" means "tunnel" or "underground passage."
Here, '땅굴' is used to describe a physical underground pathway.
땅굴은 지하에 만들어진 통로입니다.
A tunnel is a passage created underground.
In this context, '땅굴' refers to a tunnel used strategically, possibly for military purposes.
군대는 적의 땅굴을 발견하여 대책을 마련했습니다.
The military discovered the enemy's tunnel and developed countermeasures.
Here, '땅굴' is used to signify places of exploration, complementing the idea of caves.