[UN-1 6.] trans. To divest of substance; to render unsubstantial.
1799. Coleridge, Lett. (1895), 284. Death!that so unsubstantiates the living things that one has grasped.
1819. Chalmers, Congregat. Serm. (1836), I. 345. You unsubstantiate all the solemnity of his proclaimed sayings.
1881. Fraser, Berkeley, 91. The premises that unsubstantiate matter, they would argue, unsubstantiate everything.