Noun quietness has 2 senses
  1. quietness, soundlessness - the property of making no sound
    --1 is a kind of silence, quiet
    --1 has particulars: noiselessness
  2. tranquillity, tranquility, quietness, quietude - a state of peace and quiet
    --2 is a kind of calmness
    --2 has particulars:
     peace, peacefulness, peace of mind, repose, serenity, heartsease, ataraxis; easiness, relaxation
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