IPA: /ˈplæsɪdli/
KK: /ˈplæsɪdli/
In a calm and peaceful way, without disturbance or excitement.
She placidly watched the sunset, enjoying the quiet moment.
Placidly → It is formed from "placidus" (from Latin, meaning calm or peaceful) and the adverbial suffix "-ly" (meaning in a manner of). The word "placidly" means in a calm or peaceful manner.
Think of the Latin word for calm, 'placidus', to remember that 'placidly' means doing something in a calm or peaceful way.