Plural of depth; the distance downward or inward, or the deepest or most intense parts of something.
From Old English 'deop' (deep) plus the suffix '-th' (forming abstract nouns). 'Depth' emerged in Middle English, with 'depths' as its plural, often used metaphorically for emotional or spiritual extremes.
We use 'depth' metaphorically far more than literally—'the depths of despair,' 'depths of winter,' 'the depths of space.' This shows how language treats emotional and spatial dimensions almost identically!
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