Deep-freezing is a process of preserving perishable items, like food, healthcare products, etc., at very low temperatures, typically ranging from -18°C to -50°C. Some synonyms for deep-freezing include cryogenic preservation, flash freezing, ultra-cold storage, and cryopreservation. Cryogenic preservation is used to keep living tissues, while flash freezing improves food quality and maintains its original texture. Ultra-cold storage is the storage of the products below -80°C, and cryopreservation is the preservation of cells and tissues for future use. Overall, deep-freezing is a crucial process that helps avoid spoilage of food and medicine, and it is essential to have an understanding of its synonyms to communicate efficiently in contexts requiring this term.