Reenforcement /(r?`?n*f?rs"ment)/

Re·en·force·ment

Reenforcement

n.
  1. The act of reenforcing, or the state of being reenforced.
  2. That which reenforces; additional force; especially, additional troops or force to augment the strength of any army, or ships to strengthen a navy or fleet.
  3. A reward or punishment which is given to a person or animal in order to increase the likelihood that a specific behavior will be repeated. (Psychology)