reënforce

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb To strengthen with new force, assistance, material, or support;
• transitive verb (Psychology) To increase the likelihood that (a specific behavior) will be repeated by giving a reward or punishment to a person or animal.
• noun 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.
• noun An additional thickness of canvas, cloth, or the like, around an eyelet, buttonhole, etc.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb Alternative form of re-enforce.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb make stronger