depths
n. C / Un. the deepest or most central part of something. You use this to describe being far down in the ocean or in the middle of a strong feeling like sadness.
n. the most remote, central, or intense part of something, such as a physical location or an emotional state. Often used in the plural to emphasize vastness or extremity.
The divers explored the depths of the ocean.
She found herself in the depths of despair after her business failed unexpectedly.
The novel explores the depths of human nature, revealing how ordinary people react when pushed to their absolute limits by external pressure.
Usually plural when referring to a physical location or an intense emotional state; the singular 'depth' is more common for measurements.