collateralised

verb
  1. 1

    To secure a loan or other contract by using collateral.

  2. 2

    To pledge assets as collateral.

adjective
  1. 1

    Secured by a pledge of collateral.

Source: https://en.wiktionary.org/wiki/collateralise, https://en.wiktionary.org/wiki/collateralised, https://en.wiktionary.org/wiki/collateralize, https://en.wiktionary.org/wiki/collateralized