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Phrase(s): pound something on someone or something
to hit or strike someone or something with something. • Sarah pounded the vase on the robber until it broke. • Betty stood pounding her shoe on the radiator, hoping the racket would magically bring heat., Phrase(s): pound on someone or something
to beat or hammer on someone or something. • She kept pounding on him until he released her. • Will you please stop pounding on that drum?
McGrawhill's American Idioms And Phrasal Verbs