give back

verb3

1. •
   To return, restore (a thing to its original owner or location etc.).

   • Give me back my book!
2. •
   To contribute money, goods, or, especially, services for charitable purposes, as if in return for one's own success.

   • We organize this Thanksgiving dinner at the old-age home to give back to the community.
3. •
   (no longer used) To recede; to retreat.