pawn

(noun) an article deposited as security.

(noun) a person used by another to gain an end. Synonyms: instrument, cat's-paw.

(noun) (chess) the least powerful piece; moves only forward and captures only to the side; it can be promoted to a more powerful piece if it reaches the 8th rank.

(noun) borrowing and leaving an article as security for repayment of the loan.

(verb) leave as a guarantee in return for money. Synonyms: soak, hock. Example: "Pawn your grandfather's gold watch."