IPA: /pləˈkeɪtɪŋli/
KK: /pləˈkeɪtɪŋli/
In a way that calms someone down or makes them feel better, often by giving in to their demands or feelings.
She spoke placatingly to the upset child, trying to soothe his fears.
Placatingly → It is formed from "placate" (from Latin *placare*, meaning to soothe or calm) and "-ingly" (a suffix used to form adverbs). The word "placatingly" means in a manner that soothes or calms someone.
Think of the word 'placate' which means to soothe, and remember that 'placatingly' describes doing something in a soothing manner.