placidly
adverb
in a calm or peaceful manner; tranquilly.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The thirty thousand false Bavarians I looked on losing not unplacidly; But these troth-swearing sober Saxonry I reckoned staunch by virtue of their king!
From The Dynasts by Thomas Hardy