Collateral
Etymology
From Medieval Latin collateralis, "side by side" (com-, "together," plus lateralis, "of the side," from latus, "side"). The pledged asset was seen as running alongside the main promise to repay — a parallel guarantee "beside" the loan.
noun · /kuh-LAT-er-ul/
Something valuable a borrower pledges to a lender, which the lender can take if the loan is not repaid.
What it names
It is why a mortgage is cheaper than a credit card: the house backs the loan, so the lender takes less risk and charges less.
Example
She used her car as collateral to secure the small-business loan.
Related idea
When a borrower cannot repay, that is default; collateral is what the lender claims once default happens.
adjective · /kuh-LAT-er-ul/
Accompanying but secondary — running alongside the main thing, often as an unintended by-product.
What it names
side effects of an action, as in “collateral damage”
Example
The layoffs were collateral damage of the merger.
Related idea
From Latin “com-” (together) + “lateralis” (side): security set beside a loan, harm set beside an intended target, relatives set beside a shared ancestor.