rebore

re- +‎ bore

rebore (third-person singular simple present rebores, present participle reboring, simple past and past participle rebored)

1. (transitive) To bore through an existing hole, generally to correct its shape, or to enlarge.

   If you want to keep using that rifle, you'll have to rebore the barrel.

   The cylinders of your engine are so worn the rings don't seal any more; you have to have it rebored to stop it from burning oil.

   • 1950 April, “Notes and News: The Athens-Salonika Railway”, in Railway Magazine, page 279:

     Every major bridge, and many of the smaller ones, have been rebuilt, tunnels have been rebored, and long sections of track realigned.

rebore (plural rebores)

1. (automotive) The process of modifying the bore of an engine.
   • 2005, Daniel Stapleton, How to Plan and Build a Fast Road Car, page 14:

     However, any increase in capacity is useful and, if an engine is worn and needs a rebore, it's worth considering boring to a near maximum size rather than simply having it bored to the next oversize.

rebore

1. (transitive, rare) simple past and past participle of rebear, generally used in the context of Christianity.

   And on that day the Lord rebore me and I was reborn.