Adverb
In a placid manner.
Source: Webster's dictionaryKhedron was content with the order of things as it was. True, he might upset that order from time to time-but only by a little. He was a critic, not a revolutionary. On the placidly flowing river of time, he wished only to make a few ripples; he shrank from diverting its course. Arthur C. Clarke
I put the questions, and she answered them placidly Source: Internet
the sea now shimmered placidly before our eyes Source: Internet