См. также: объезд, объект любви, объективная сторона преступления, объявлять о созыве собрания
"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)
Pawn means to pledge an item of personal property as security for a loan, and leave the pledged item with a pawnbroker. (USLegal)
