The word "leverage" refers to the ability to influence a situation or person to achieve a desired outcome. In a financial context, it denotes using borrowed capital for an investment, expecting that the profits made will be greater than the interest payable. In a broader sense, it can also mean using resources or advantages effectively to gain a greater benefit.
The term "leverage" comes from the French word "levier," which means "to raise" or "to lift." It entered the English language in the late 19th century and originally referred to the mechanical advantage gained by using a lever.