Source : Webster's Revised Unabridged Dictionary (1913)

Reenforce \Re`["e]n*force"\ (-f?rs"), v. t. [Pref. re- +
   enforce: cf. F. renforcer.]
   To strengthen with new force, assistance, material, or
   support; as, to re["e]nforce an argument; to re["e]nforce a
   garment; especially, to strengthen with additional troops, as
   an army or a fort, or with additional ships, as a fleet.
   [Written also {reinforce}.]

Reenforce \Re`["e]n*force"\, n. [See {Re["e]nforce}, v., and cf.
   {Ranforce}, {Reinforce}.]
   Something which re["e]nforces or strengthens. Specifically:
   (a) That part of a cannon near the breech which is thicker
       than the rest of the piece, so as better to resist the
       force of the exploding powder. See Illust. of {Cannon}.
   (b) An additional thickness of canvas, cloth, or the like,
       around an eyelet, buttonhole, etc.

Source : WordNet®

reenforce
     v : make stronger; "he reinforced the concrete" [syn: {reinforce}]