root canal therapy
a specific treatment for disease of the dental pulp involving removal of the nerve and other tissues from the pulp cavity and their replacement with filling material.
Why Is The Word “Root” In “Root Beer”?Is root beer the world's most oddly named carbonated beverage ... we don't know, that award might go to 7-up, but we're going to explore the naming of this soft drink regardless. What, after all, is the root in root beer?
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019