noun

1. a metal ring or cap put around the end of a cane, tool handle, etc. to prevent splitting or to give added strength
2. Mech. a short tube or bushing for tightening a joint

Etymology: formerly verrel < ME & OFr virole, iron ring on a staff < L viriola, dim. of viriae, bracelets, via Celt < IE *weir-, wire, twisted work (> wire) < base *wei-, to bend, twist > L viere, to twist, bind around; sp. altered after L ferrum, iron

transitive verb ferruled -·ruled, ferruling -·rul·ing