(nautical) a small engine (as one used on board ships to operate a windlass)
someone who acts as assistant
functioning in a supporting capacity
furnishing added support
motor that converts thermal energy to mechanical work
something used to achieve a purpose
a wheeled vehicle consisting of a self-propelled engine that is used to draw trains along railway tracks
an instrument or machine that is used in warfare, such as a battering ram, catapult, artillery piece, etc.