It is generally not recommended to refreeze food that has been partially defrosted. When you defrost food, ice crystals within the food melt, and harmful bacteria that may have been present can start to multiply. If you then refreeze the partially defrosted food, those bacteria can survive and continue to multiply when the food is thawed again.
Ideally, you should thaw food in the refrigerator, under cold running water, or in the microwave using the defrost setting. Once food has been completely thawed, it should be cooked or consumed promptly to ensure food safety. If you have thawed more food than you can use, it is better to cook it and then freeze the cooked portion for future consumption. This way, you avoid the risk of bacterial growth from refreezing partially defrosted food.
Always prioritize food safety and follow recommended guidelines to minimize the risk of foodborne illnesses.