'Placidly' definitions:

Definition of 'placidly'

From: WordNet
adverb
In a quiet and tranquil manner; "the sea now shimmered placidly before our eyes"
adverb
In a placid and good-natured manner; "I put the questions, and she answered them placidly"

Definition of 'Placidly'

From: GCIDE
  • Placidly \Plac"id*ly\, adv. In a placid manner. [1913 Webster]