inexplainable

Why they did not when they had four times the number of men as the British was inexplainable.

From The Story of the Great War, Volume IV (of 8) Champagne, Artois, Grodno; Fall of Nish; Caucasus; Mesopotamia; Development of Air Strategy; United States and the War by Miller, Francis Trevelyan

During the various trips several mysterious and inexplainable things occurred.

From The Wonder Island Boys: Exploring the Island by Finlay, Roger Thompson

The third, and to me the most remarkable, class is found not in certain personages or superstitious and determined proceedings, but in sudden and capricious scenes, and in improbable and inexplainable apparitions.

From The Philippine Islands, 1493-1898 - Volume 40 of 55 1690-1691 Explorations by Early Navigators, Descriptions of the Islands and Their Peoples, Their History and Records of the Catholic Missions, as Related in Contemporaneous Books and Manuscripts, Showing the Political, Economic, Commercial and Religious Conditions of Those Islands from Their Earliest Relations with European Nations to the Close of the Nineteenth Century by Blair, Emma Helen

There was something inexplainable about this maid who veiled her eagerness to admit him with such transparencies.

From Broken to the Plow by Dobie, Charles Caldwell

It has already been said it was the custom of Deerfoot to follow a certain inexplainable intuition which often came to his help in his moments of doubt.

From Camp-fire and Wigwam by Ellis, Edward Sylvester