ppl. a. (UN-1 10.)
Both adj. and adv. (see next) are common from c. 1860.
182832. Webster (citing J. M. Mason).
1846. Mrs. A. Marsh, Father Darcy, II. xxi. 356. Unquestioning obedience to the authority of his superiors.
1861. Geo. Eliot, Silas M., ii. The unquestioning activity of a spinning insect.
1875. E. White, Life in Christ, IV. xxvii. 470. Schools which have accepted with unquestioning faith, the everlasting duration of the soul.
Hence Unquestioningly adv., -ness.
1857. Susanna Winkworth, trans. Life Tauler, 90. Inclined to follow blindly and unquestioningly their spiritual masters.
1876. Mrs. Whitney, Sights & Ins., III. 98. His eyes were as steadfast as hers; but they had not her unquestioningness.