Comparative law notes
Under the German concept, the secured party actually has physical or constructive possession of the subject matter of the pledge; i.e., the collateral.
There are multiple definitions - click on the translation that matches your context.
Pfandgegenstand
Substantiv
partial
collateral
noun
Definitions of collateral
assets (=something valuable) that you promise to give someone if you cannot pay back money that you owe them
We used our house as collateral for the loan.