a. [ L. tranquillus; probably fr. trans across, over + a word akin to quietus quiet: cf. F. tranquille. See Quiet. ] Quiet; calm; undisturbed; peaceful; not agitated;
A style clear, tranquil, easy to follow. De Quincey. [ 1913 Webster ]
n. [ F. tranquillité, L. tranquillitas. ] The quality or state of being tranquil; calmness; composure. [ 1913 Webster ]
adv. In a tranquil manner; calmly. [ 1913 Webster ]
n. Quality or state of being tranquil. [ 1913 Webster ]