regenerate

reestablish on a new, usually improved, basis or make new or like new

We renewed our friendship after a hiatus of twenty years

amplify (an electron current) by causing part of the power in the output circuit to act upon the input circuit

bring, lead, or force to abandon a wrong or evil course of life, conduct, and adopt a right one

The Church reformed me

return to life; get or give new life or energy

The week at the spa restored me

replace (tissue or a body part) through the formation of new tissue

The snake regenerated its tail