Why does Hamlet refer to Rosencrantz as a sponge

In Hamlet, Rosencrantz is referred to as a "sponge" because he has soaked up all the benefits of Claudius's authority. In saying this, Hamlet wants his friend to know that he doesn't trust him and that he regards him as just another one of Claudius's lackeys.

Explanation:

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obama was told in early july 2004 that he was chosen to deliver the address, and he largely wrote the speech himself, with later edits from the kerry presidential campaign.