The process or act of dwindling; a gradual decrease or reduction in amount or size.
Formation of 'dwindle' plus the suffix -ment, which creates nouns meaning 'the result or process of an action' (as in 'amazement' or 'achievement').
This is a rare word that captures the entire *process* of something shrinking rather than just the action itself—it's the journey downward, not just the endpoint.
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