The act of binding or fitting with a ferrule, which is a metal ring or band used to strengthen or hold something together.
From 'ferrule' (itself from Latin 'ferrum' meaning iron), with the gerund suffix '-ing' added to create the noun form of the verb 'to ferrule'.
Feruling is crucial in fishing rod and tool manufacturing—a tiny metal band applied at exactly the right spot prevents expensive equipment from splitting and failing, turning weak points into reinforced joints.
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