Wiktionary
placatingly
adv. In a manner that serves to placate.
WordNet
placatingly
adv. in a placating manner; "Jenny smiled placatingly"
Usage examples of "placatingly".
Carole shushed her impatiently, but Bronwyn continued placatingly to the old woman.
I gestured placatingly with the bandanna, but she pivoted, glanced at me over one muscular shoulder, and, imparting a pretty swivel to her steatopygic fanny, stalked eastward through the undergrowth.