Wordie: Engine

(n): machine that converts other forms of energy into mechanical energy and so imparts motion

(n): something used to achieve a purpose

(n): any entity that produces an effect or is responsible for events or results

(n): a wheeled vehicle consisting of a self-propelled engine that is used to draw trains along railway tracks

(n): a wheeled vehicle that carries in itself a means of propulsion

(n): an instrument or machine that is used in warfare, such as a battering ram, catapult, artillery piece, etc.

(n): a device that requires skill for proper use

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