The act of running down or the process of occurring; a downward movement or occurrence.
From Latin 'decurrens', present participle of 'decurrere' (to run down), combining 'de-' (down) and 'currere' (to run). It evolved to mean any downward process or occurrence.
This is an archaic word that beautifully captures the image of something flowing or running downward—it's why 'current' comes from the same root, originally meaning water running down a riverbed.
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