a. (UN-1 7 b.)
a. 1677. Barrow, Serm., Wks. 1687, I. 255. A weapon whose impression is altogether inevitable and unsustainable.
1716. M. Davies, Athen. Brit., III. 61. [To] revive an unsustainable Cause, so often sunk, and so often irretrievably baffled.
1740. Phil. Trans., XLI. 414. This Notion is certainly as unsustainable as the First.
1857. Toulmin Smith, Parish, 297. It was unanimously held that these pleas were unsustainable.
1885. Sir J. Bacon, in Law Times Rep., LII. 210/2. The application is wholly unsustainable.