Calmly

without rough motion; still or nearly still:
a calm sea.
not windy or stormy:
a calm day.
free from excitement or passion; tranquil:
a calm face; a calm manner.
freedom from motion or disturbance; stillness.
Meteorology. wind speed of less than 1 mile per hour (0.447 m/sec).
freedom from agitation, excitement, or passion; tranquillity; serenity:
She faced the possibility of death with complete calm.
to make calm:
He calmed the excited dog.
to become calm (usually followed by down).
Contemporary Examples

Those Awful Airline Fees From United, American, Delta, and the Rest Add Up William J. McGee August 12, 2012
What the Stars Hold for Your Week Starsky + Cox July 7, 2011
Fifty Little CIAs Ken Allard January 11, 2010
Here on Earth, The Forgotten Founding Father, and Other Reviews The Daily Beast April 29, 2011
Pope Francis Declares Consumers and Capitalists Need to Help the Poor Daniel Gross November 25, 2013

Historical Examples

Starman’s Quest Robert Silverberg
Way of the Lawless Max Brand
Harper’s Young People, January 11, 1881 Various
Chip, of the Flying U B. M. Bower
Ainslee’s magazine, Volume 16, No. 2, September, 1905 Various

adjective
almost without motion; still: a calm sea
(meteorol) of force 0 on the Beaufort scale; without wind
not disturbed, agitated, or excited; under control: he stayed calm throughout the confusion
tranquil; serene: a calm voice
noun
an absence of disturbance or rough motion; stillness
absence of wind
tranquillity
verb
(often foll by down) to make or become calm
adv.
adj.
n.
v.
Children Affected with Lymphatic Malformations