9 letters · 9 points in Scrabble
noun (poetic) tranquil silence
noun calmness without winds
noun a state of no motion or movement
originFrom 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.
Etymology from Wiktionary, CC BY-SA 3.0