Tranquil
Pronunciation : Tran"quil
Part of Speech : a.
Etymology : [L. tranquillus; probably fr. trans across, over + a word akin to quietus quiet: cf. F. tranquille. See Quiet.]
Definition : Defn: Quiet; calm; undisturbed; peaceful; not agitated; as, the atmosphere is tranquil; the condition of the country is tranquil. A style clear, tranquil, easy to follow. De Quincey.
Source : Webster's Unabridged Dictionary, 1913