collateral

她用自己的房子作为贷款抵押。

She used her house as ___collateral for the loan.

这两个主张并非核心，而只是附带性的。

The two claims are not central but merely ___collateral.

虽然他们是堂兄弟，但属于旁系亲属关系。

Although they are cousins, they are ___collateral relatives.