adv. [f. TRANQUIL + -LY2.] In a tranquil manner; calmly, quietly.
1801. [see tranquillizing].
1841. Lane, Arab. Nts., I. 73. Tranquilly to sit by a mortal enemy.
1847. C. Brontë, J. Eyre, xi. The reason they rest tranquilly in their graves now.
1852. Hawthorne, Snow Image, etc., Gt. Stone Face (1879), 46. More years sped swiftly and tranquilly away.