The industrial process of heating coal in an oxygen-free environment to produce coke fuel, or the present participle of 'coke' as a verb.
From 'coke' + '-ing' (gerund/present participle suffix). Industrial terminology that emerged with modern coal-to-coke manufacturing in the 1800s.
Coking is one of those industrial processes that enabled the modern world—without coking, steel production would have been impossible, and without steel, no trains, bridges, or skyscrapers. It's a technical word that changed civilization.
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