The act of attaching a ferrule or metal ring to the end of something to strengthen or reinforce it.
From ferrule + -ing (present participle). The verb form emerged as craftspeople needed a word for the active process of adding these protective rings to objects.
Ferruling is one of those specific craft verbs that's nearly disappeared from everyday speech, but factories still use the technique billions of times a year on pencils, tools, and sports equipment.
Complete word intelligence in one call. Free tier — 50 lookups/day.