Reenter /(r?*?n"t?r)/

Re·en·ter

Reenter

v. t.
  1. To enter again; as, You cannot re-enter the country with this visa.
  2. To cut deeper, as engraved lines on a plate of metal, when the engraving has not been deep enough, or the plate has become worn in printing. (Engraving)
  3. To put (data) into a document or form on a computer again; -- usually to correct an erroneous entry; as, the password was incorrect, and had to be reentered. (Computers)

Reenter

v. i.
  1. To enter anew or again.

Phrases & Compounds
Reentering angle
an angle of a polygon pointing inward, as a, in the cut.
Reentering polygon
a polygon having one or more reentering angles.