collateral
/kəˈlætərəl; kə`lætərəl/ adj
1 side by side; parallel 并排的; 平行的; 并行的.
2 connected but less important; additional 有关的（但为次要的）; 附属的; 附带的; 附加的
collateral evidence 旁证
a collateral aim 附带的目的.
3 descended from the same ancestor, but by a different line 同一祖先而不同支的; 旁系的
a collateral branch of the family 这家族的旁支. collateral, n [U]
(also collateral security) property pledged as a guarantee for the repayment of a loan 抵押物; 担保品
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.