imperturbably
advEtymology From imperturbable + -ly.
1
In an imperturbable manner; calmly.
- ‘Are you an alienist?’ I interrupted. ‘Every doctor should be - a little,’ answered that original, imperturbably.1899 February, Joseph Conrad, “The Heart of Darkness”, in Blackwood’s Edinburgh Magazine, volume CLXV, number M, New York, N.Y.: The Leonard Scott Publishing Company, […], →OCLC, part I, page 201: