Learn how to say Ferrule correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word ferrule:
a ring or cap, typically a metal one, which strengthens the end of a handle, stick, or tube and prevents it from splitting or wearing.
a metal band strengthening or forming a joint.
early 17th century: alteration (probably by association with Latin ferrum ‘iron’) of obsolete verrel, from Old French virelle, from Latin viriola, diminutive of viriae ‘bracelets’