The process or technique of forming or shaping something into an arch, or the act of creating an electrical arc.
From 'arc' + '-ing' (gerund/present participle suffix); variant spelling of 'arcing' in some specialized technical and architectural contexts.
In welding and metalworking, 'arcking' is when you use the arc to melt metal together—it's controlled electricity doing creative work, which is why arc welding revolutionized construction.
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