a. (UN-1 7.)
1817. Keats, Sleep & Poetry, 263. Nought more untranquil than the grassy slopes Between two hills.
1850. J. H. Newman, Diffic. Anglic., 76. Fanatical doctrine and untranquil devotion.
1869. Tyndall, Notes Lect. Light, § 188. A tranquil pellucid portion … and a turbid or untranquil portion.
