Adjective

(en-adj)

Having, or capable of exerting power, potency or influence.

* (William Shakespeare)

The powerful grace that lies / In herbs, plants, stones, and their true qualities.

*{{quote-book, year=1963, author=(Margery Allingham), title=(The China Governess)

, chapter=19 citation , passage=As soon as Julia returned with a constable, Timothy, who was on the point of exhaustion, prepared to give over to him gratefully. The newcomer turned out to be a powerful youngster, fully trained and eager to help, and he stripped off his tunic at once.}}

(mining) Large; capacious; said of veins of ore.

Adjective

(-)

(of a device) Self-powered, such as by an electric motor or an internal engine; not requiring external power, such as from a person or a horse.

* 2007 , John W. Diers and Aaron Isaacs, Twin Cities by Trolley: The Streetcar Era in Minneapolis and St. Paul , University of Minnesota Press, ISBN 0-8166-4358-X, page 145,

Around the same time, TCRT experimented with removing the motors on one of its older cars, turning it into an unpowered trailer that could be towed behind a powered car.