collateral

中文： 担保、抵押品、抵押物

1. A security or guarantee (usually an asset) pledged for the repayment of a loan if one cannot procure enough funds to repay. (countable, uncountable)
2. A branch of a bodily part or system of organs. (countable, uncountable) · Besides the arteries blood streams through numerous veins we call collaterals.
3. Printed materials or content of electronic media used to enhance sales of products (short form of collateral material). (countable, uncountable)
4. A thinner blood vessel providing an alternate route to blood flow in case the main vessel becomes occluded. (countable, uncountable)
5. An instance of hitting two or more targets, often enemy players, with a single shot, usually when they are lined up behind each other. (countable, uncountable)

复数 collaterals