stillness

From Middle English stilnesse, from Old English stilnes (“stillness, quiet; absence of noise or disturbance, release, relaxation; silence, abstention from speech; absence of disturbance or molestation, tranquility, peace, security; that which appeases”), equivalent to still +‎ -ness.

stillness (countable and uncountable, plural stillnesses)

1. The quality or state of being still

   Synonyms: calmness, motionlessness, inactivity, inertia

2. Habitual silence or quiet; taciturnity.

   Synonyms: quietness, silence

   • 1603, William Shakespeare, The Tragedy of Othello, The Moor of Venice, II. iii. 186:

     The gravity and stillness of your youth / The world hath noted;

stillness in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.