engine

definition: motor that converts thermal energy to mechanical work
example:
speech part: noun
synonyms:
definition: an instrument or machine that is used in warfare, such as a battering ram, catapult, artillery piece, etc.
example: medieval engines of war
speech part: noun
synonyms:
definition: a wheeled vehicle consisting of a self-propelled engine that is used to draw trains along railway tracks
example:
speech part: noun
synonyms: locomotive
definition: something used to achieve a purpose
example: an engine of change
speech part: noun
synonyms:

engine is explained and pronounced

How engine is being used?