名詞 collateral:

1. a security pledged for the repayment of a loan

形容詞 collateral:

1. descended from a common ancestor but through different lines
   同義詞：indirect
2. serving to support or corroborate
   同義詞：confirmative, confirming, confirmatory, corroborative, corroboratory, substantiating, substantiative, validating, validatory, verificatory, verifying
3. accompany, concomitant
4. situated or running side by side

1. Lacking the protection of insurance or collateral security.
   未經(jīng)保險的未發(fā)保險的，無附加擔(dān)保的
2. The bank will insist on collateral for a loan of that size.
   銀行對這樣的大筆貸款一定要有抵押物。

col.lat.er.al

adj.Abbr. collat.,coll.（形容詞）縮寫 collat.,coll.
Situated or running side by side; parallel.
并行的：并排放置或運行；平行的
Coinciding in tendency or effect; concomitant or accompanying.
附屬的：在傾向或效果上相協(xié)調(diào)一致的；附屬的或隨從的
Serving to support or corroborate:
附屬擔(dān)保的：用于支持或證實的：
例句：
collateral evidence.
旁證

Of a secondary nature; subordinate:
附屬的：第二位的；服從的：
例句：
collateral target damage from a bombing run.
在轟炸航程中的從屬目標(biāo)

Of, relating to, or guaranteed by a security pledged against the performance of an obligation:
擔(dān)保的：為履行義務(wù)而擔(dān)保所確保的或與之相關(guān)的，擔(dān)保的 ：
例句：
a collateral loan.
擔(dān)保債務(wù)

Having an ancestor in common but descended from a different line.
旁系的：有共同的祖先但出自不同家系
n.（名詞）
Property acceptable as security for a loan or other obligation.
擔(dān)保物：被接受作為抵押或其他義務(wù)擔(dān)保的財產(chǎn)
A collateral relative.
旁系親屬

來源：
Middle English
中古英語
from Medieval Latin coll3ter3lis
源自 中世紀(jì)拉丁語 coll3ter3lis
Latin com- [com-]
拉丁語 com- [前綴，表.共同.]
Latin l3tus l3ter- [side]
拉丁語 l3tus l3ter- [旁邊]

【引伸】
collat.erally
adv.（副詞）