How to Say "abyss" in Spanish
The Spanish word for “abyss” is “pozo” — C1 level.
English → SpanishC1
nounC1informal
a deep, dark place

Examples
Después de perder su trabajo, cayó en un pozo de tristeza.
After losing his job, he fell into a pit of sadness.
Mi profesor es un pozo de sabiduría; siempre tiene la respuesta.
My professor is a fountain of knowledge; he always has the answer.
Metaphorical Usage
When 'pozo' is used figuratively, it emphasizes the idea of depth—a deep lack (of hope) or a deep reservoir (of knowledge).
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