Metamorphosing is a process of transformation, often associated with animals such as butterflies and frogs. It involves a drastic CHANGE in FORM, structure, or function. The term is derived from the Greek words 'meta' meaning 'CHANGE' and 'MORPH' meaning 'FORM'. In the crossword, two solutions were given for the term: ALTERING (8 letters) and CHANGING (8 letters). Both words describe the process of metamorphosing, as they refer to making a significant alteration or transformation.