He asked her to pledge the house as security for a loan.

他要她抵押房子作为贷款担保。

《柯林斯英汉双解大词典》

Something given as security for a loan; a pledge or guaranty.

担保品为合同安全起见而抵押的物品；

youdao

The real purpose of this new property loan policy is to boost credit support for building an a ordable housing system for social security purposes.

新的房地产贷款政策目的在于为建立社会住房保障体系提供信贷支持，从而促进社会的稳定。

youdao

"It appears that we are talking about a lone individual who came to the bank in the morning hours, sought cover for a debt, a loan, and did not get it, " said Internal Security Minister Yitzhak Aharonovitch.

BBC: Israel bank shooting leaves four dead

Because over the course of a year, there is a danger that the bank that you've borrowed from - and is holding your assets as security for the loan - could go bust.

BBC: Where to find bank stress