The word "levier" is French for "lever" and is typically used in the context of mechanical devices. Synonyms for "levier" include "piston", "crank", "handle", "lever arm", "switch", and "control stick". These terms all refer to some kind of device that transmits a force or motion to a mechanical system. For example, a piston is a cylinder that creates a force when moved, while a control stick is used to pilot aircraft and move various controls. When looking for synonyms for "levier", it is important to consider the context in which the term is being used, as different types of mechanical systems require different types of levers and controls.