re-refine

From re- +‎ refine.

re-refine (third-person singular simple present re-refines, present participle re-refining, simple past and past participle re-refined)

1. Alternative form of rerefine
   • 2013, Barbara Ward, Progress for a Small Planet, →ISBN:

     For instance, one of the aluminum companies has developed new processes that re-refine and smelt aluminum more efficiently, cutting energy consumption by 30 percent and, incidentally, cutting water use and polluting emissions.

• free rein