Unwinding and untwisting are two related terms that refer to the process of loosening or unraveling something that has been tightly wound or twisted. Unwinding is the act of unwrapping or uncoiling a material, while untwisting is the act of undoing a twist in a material. Both terms are commonly used in the context of rope, yarn, and other materials that can be tightly wound or twisted. In addition, these terms can also be used figuratively to refer to the process of resolving a complicated situation or problem.