a. Also 7 tranquill. [ad. L. tranquillus quiet. Cf. F. tranquille (1470 in Godef., Compl.).] Free from agitation or disturbance; calm, serene, placid, quiet, peaceful. a. Of the mind, or affairs.
1604. Shaks., Oth., III. iii. 348. Farewell the Tranquill minde; farewell Content.
1623. Cockeram, Tranquill, quiet, peaceable.
1755. Mrs. Delany, in Life & Corr. (1861), III. 328. I thank God all is tranquil again, after many fears and alarms.
1791. Mrs. Radcliffe, Rom. Forest, i. Adeline appeared more tranquil than she had yet been. Ibid. (1794), Myst. Udolpho, xliii. She had sat … watching in tranquil melancholy the gradual effect of evening over the extensive prospect.
1872. Howells, Wedd. Journ. (1892), 66. They sat down for the tranquiller observance of the wharf.
b. Of the sea, the weather, a landscape, etc.
1748. Anson’s Voy., I. viii. 83. Relieved by approaching a warmer climate and more tranquil seas.
1807. Crabbe, Library, 52. The treasures of this tranquil scene.
1836. Emerson, Misc., Nature, Wks. (Bohn), II. 143. In the tranquil landscape … man beholds somewhat as beautiful as his own nature.
1861–75. J. H. Bennet, Winter Medit., I. v. 122. The ordinary notion of the Mediterranean is that of a blue and tranquil ocean lake.
c. Of things or actions: Steady, regular, even.
1796. Kirwan, Elem. Min. (ed. 2), I. 434. Crystallized by tranquil fusion and slow refrigeration.
1827. Faraday, Chem. Manip., xiii. (1842), 293. The heating power of the tranquil flame is much economised … by using a jacket.
1886. Ruskin, Præterita, I. vi. 298. How those winding roads steal with their tranquil slope from height to height.
