Metamorphose, as a larva, is the process of changing from one form to another. Pupate is the 6 letter term used to describe the process of a larva transforming into an adult insect. This transformation is known as metamorphosis and is a key part of the life cycle of many insects. During pupation, the larva will form a protective cocoon or chrysalis around itself and undergo a series of changes until it emerges as an adult.