n.

1. 深淵；深坑；深處[C]
   One slip on this mountain and you will fall into the abyss.

   在這座山上一失足便會跌入萬丈深淵。

2. 任何深不可測的事物；（智力等的）深邃[C][U]
   abyss of shame

   羞愧無比

3. 【宗】（創世之前的）混沌

n.

1. a very deep chasm.
2. (the abyss) a catastrophic situation seen as likely to occur.