n.a bottomless gulf or pit; any unfathomable (or apparently unfathomable) cavity or chasm or void extending below (often used figuratively)

同義詞：abyss

1. He felt as if he were staring into an abysm of despair.
   他感覺自己仿佛在凝視一片絕望的深淵。
2. The abysm of the ocean is home to many unknown creatures.
   海洋的深淵是許多未知生物的棲息地。