collateral

a. 并行的,附随的,旁系的
n. 支亲,副保,附属担保物

The bank will insist on collateral for a loan of that size.

银行对这样的大笔贷款一定要有抵押物。

Lacking the protection of insurance or collateral security.

未经保险的未发保险的，无附加担保的