深しん淵えん

noun

abyss; deep chasm; ravine

Literary or formal word for a very deep, dark place, often used metaphorically for something profound or unfathomable.

• 彼かれは深しん淵えんをのぞき込こむように、暗くらい谷たに底ぞこを見みつめた。

  He stared into the dark valley floor as if peering into an abyss.

• その哲てつ学がく書しょは人にん間げんの心こころの深しん淵えんに迫せまる。

  That philosophy book delves into the abyss of the human mind.