engine
Cross references: 1. fire engine 1. en.gine \'en-j*n\ n [ME engin, fr. OF, fr. L ingenium natural disposition, talent, fr.]in- + gignere to beget obs 1a: INGENUITY 1b: evil contrivance : WILE archaic 2: something used to effect a purpose : AGENT 3a: a mechanical tool : as 3a1: an instrument or machine of war obs 3a2: a torture implement 3b: MACHINERY 3c: any of various mechanical appliances 4: a machine for converting any of various forms of energy into mechanical force and motion 5: a railroad locomotive 2. engine vt : to equip with an engine
Webster's English Dictionary