rewarm

From re- +‎ warm.

rewarm (third-person singular simple present rewarms, present participle rewarming, simple past and past participle rewarmed)

1. To warm again; to bring back to a state of warmth.
   • 1849, Currer Bell [pseudonym; Charlotte Brontë], “Two Lives”, in Shirley. A Tale. […], volume II, London: Smith, Elder and Co., […], →OCLC, page 265:

     Her book has perhaps been a good one; it has refreshed, refilled, rewarmed her heart; […]

• warmer