This is the 13013th most frequent Polish word.
odgrzać
To reheat.
Here, 'odgrzać' is used to indicate reheating food to make it warm again for consumption.
Muszę odgrzać obiad przed kolacją.
I need to reheat the lunch before dinner.
In this context, 'odgrzać' takes a figurative meaning, suggesting bringing up or addressing something from the past.
Postanowiłem odgrzać starą sprawę.
I decided to revive an old issue.
The verb 'odgrzać' here again specifically refers to reheating food, emphasizing its practical application.