rebore

verb

re·​bore (ˌ)rē-ˈbȯr 

rebored; reboring; rebores

transitive verb

: to bore an existing hole a second or subsequent time in order to widen it or to alter or improve its inner surfaces

After three years in the desert dust, I have just had to rebore the engine (another $1,400).

—Robert Lacville

To convert the 3-inch Ordnance Rifle to a breechloader, manufacturers sawed off the breech and screwed in a new steel breech … . The steel breech was rebored to 3.18 inches to attain the desired projectile size.

—Mitch Meador

Word History

First Known Use

circa 1792, in the meaning defined above