/kəˈlætərəl ||; kəˈlætərəl/noun [U] property or sth valuable that you agree to give to sb if you cannot pay back money that you have borrowed （贷款的）担保物，抵押品
collateral²
/kəˈlætərəl ||; kəˈlætərəl/adj (formal 正式) connected with sth else, but in addition to it and less important 伴随的；附带的