commodatum

noun | \ ˌkä-mə-ˈdā-təm, ˌkō-mō-ˈdä-tu̇m \ | com·mo·da·tum
  1. : a gratuitous loan of movable property to be used and returned by the borrower : loan for use at loan — compare deposit, gratuitous bailment at bailment, loan for consumption at loan