quietly

with low volume

• “speak softly but carry a big stick”
• “she spoke quietly to the child”
• “the radio was playing softly”

with little or no sound

• “the class was listening quietly and intently”
• “she was crying quietly”

with little or no activity or no agitation (`quiet'' is a nonstandard variant for `quietly'')

• “her hands rested quietly in her lap”
• “the rock star was quietly led out the back door”
• “sit here as quiet as you can”

in a restful manner

• “the streets are restfully sunny and still for the town is at mass”