What is the twisted blade on a blade called?

The twisted blade on a sWord or knife is often referred to as a "twisted blade" or "twisted design." This feature is typically a decorative element that can enhance the blade's aesthetics and may also serve functional purposes, such as improving grip or reducing drag when cutting. In some cases, it can also refer to a type of blade known as a "tormented" or "spiral" sWord, which has a distinct spiral shape along its length.