Placidly means in a way that is placid—calm, peaceful, or quiet. Placid is used to describe things that have a calm appearance or a calm nature, such as a placid pond whose surface is perfectly still. When placid is used to describe people, it can mean that they're very calm and even-tempered.

What is a placid person like?

Coming from the Latin placidus "pleasing or gentle," placid is most commonly used to describe a person who is not easily irritated or a body of water such as a lake that does not have waves to disturb the surface. Synonyms of placid in both meanings include calm, serene and tranquil.

What is meaning of placidity?

noun. a calm or peaceful quality; tranquillity; serenity: John Denver sang about the placidity of the Colorado wilderness.