Definitions:
a tool with a heavy metal head mounted at right angles at the end of a handle, used for jobs such as breaking things and driving in nails.

a metal ball of about 7 kg attached to a wire for throwing in an athletic contest.

hit or beat (something) repeatedly with a hammer or similar object

attack or criticize forcefully and relentlessly

beat down the price of (a stock)

declare (a person or company) a defaulter

a british film company (full name hammer film productions) founded in 1948, known especially for its horror films.