noun
a person, place, thing, or idea. In this case, 'salt shaker' is a thing used to hold and dispense salt.
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The waiter brought a silver salt shaker to the table for seasoning.
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Can you pass me the salt shaker, please?
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Hey, can you toss me the salt shaker over here?
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Her words were like shaking a salt shaker over an open wound, adding insult to injury.