Mortgage

[mort-gage, -gaged, -gag-ing] (Oxford English Dictionary)

NOUN 1 a legal agreement by which a person takes out a loan using as security real property (usually a house which is being purchased). 2 an amount of money borrowed or lent under such an agreement.

VERB transfer the title to (a property) to a creditor as security for the payment of a loan.
- ORIGIN Old French, ‘dead pledge'.