1707. Curios. in Husb. & Gard., 134. We know by uncontradictable Experiments, that Nitre … attracts … Humidity.
1825. Bentham, Offic. Apt. Maximized, Indicat. (1830), 70. That confidence-commanding and uncontradictable hand.
Hence Uncontradictably adv.
1862. T. A. Trollope, Marietta, I. iv. 64. The means by which one moral nature speaks … uncontradictably to another.
