См. также: предложение о заключении договора, предмет тендера, предпоследний, прерывание
"Pledge" has a foreign sound to it. I would not use it unless I was forced into it, because it's not a word in normal (UK) English use, whereas "collateral for a loan" is very common. (David Knowles, ProZ.com)
If your pledged item is stolen from the shop, the pawnbroker's liability is limited to waiving loan repayment - remember, the shop does not have to replace your goods. (The Guardian)
Pawn means to pledge an item of personal property as security for a loan, and leave the pledged item with a pawnbroker. (USLegal)
