1. An article deposited as security.
2. Borrowing and leaving an article as security for repayment of the loan; SYN. pawning.
3. The least powerful chessman; moves only forward and captures only to the side; can be promoted if it reaches the 8th rank.

One of the chessmen of least value having the power to move only forward ordinarily one square at a time, to capture only diagonally forward, and to be promoted to any piece except a king upon reaching the eighth rank

To give as a guarantee; SYN. soak, hock.