Regeneration

ONE :

• the act of improving a place or system, especially by making it more active or successful:

The Council is committed to a programme of urban regeneration.

TWO :

• spiritual renewal or revival

THREE :

• the act of something growing or being grown again

The treatment promotes regeneration of nerve cells in the spinal cord.

FOUR :

• utilisation by special devices of heat or other products that would ordinarily be lost