reinforcement

noun

1. a military operation (often involving new supplies of men and materiel) to strengthen a military force or aid in the performance of its mission"they called for artillery support"
2. information that makes more forcible or convincing"his gestures provided eloquent reinforcement for his complaints"
3. (psychology) a stimulus that strengthens or weakens the behavior that produced it
4. a device designed to provide additional strength"the cardboard backing was just a strengthener"
5. an act performed to strengthen approved behavior