TRANQUILLY
tranquilly
(adverb) without emotional agitation; “tranquilly she went on with her work”
Source: WordNet® 3.1
Etymology
Adverb
tranquilly (comparative more tranquilly, superlative most tranquilly)
In a tranquil manner.
Source: Wiktionary
Tran"quil*ly, adv.
Definition: In a tranquil manner; calmly.
TRANQUIL
Tran"quil, a. Etym: [L. tranquillus; probably fr. trans across, over
+ a word akin to quietus quiet: cf. F. tranquille. See Quiet.]
Definition: 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 Edition