Battering-ram n. : An engine used in ancient times to beat down the walls of besieged places.

Battering-ram n. : A blacksmith's hammer, suspended, and worked horizontally.

Example:
How can I build a battering ram?

Taxonomy
battering ram, chains, free encyclopedia, target, fire, Replica, obstacle, damage, ropes, hides, attacks, defenders, speed, the Assyrian, siege of Gloucester, locked doors, search, Unsourced.

Defination from the web:
battering ram is a siege engine originating in ancient times to break open fortification walls or doors. ... In a more sophisticated design, a battering ram was slung from a wheeled support frame by ropes or chains so that it could be much more massive ...