reignite

verb2

1. •
   To ignite again.

   • Firefighters remained at the scene all day to prevent the smoldering remains from re-igniting. — 1979
2. •
   (figurative) To start again, especially animosity or argument.

   • The verdict against Yingluck is widely seen as having the potential to reignite tensions, though the junta has largely snuffed out open opposition. — 2017