What is the origin of the word fettle?

The Word "fettle" originates from the Middle English term "fetlen," which means to make or to fit. It is derived from the Old Norse Word "fetla," meaning to make or to fashion, and is related to the concept of preparing or putting something in order. Over time, "fettle" has come to refer to being in a state of readiness or condition, particularly in phrases like "in fine fettle."