How to Say "ocean trench" in Spanish
The Spanish word for “ocean trench” is “fosa” — C1 level.
English → SpanishC1
nounC1formal
geography

Examples
La fosa de las Marianas es el lugar más profundo del mundo.
The Mariana Trench is the deepest place in the world.
Existen criaturas extrañas viviendo en las fosas oceánicas.
There are strange creatures living in the ocean trenches.
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