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Susurrus : a whispering or rustling sound.
(Late Middle English: from late Latin susurratio(n- ), from Latin susurrate ‘to murmur, hum’,
​from susurrus ‘whisper’.)

“It was lonely on the hill, and cold.
And all you could do was keep going. You could scream, cry, and stamp your feet, but apart from making you feel warmer, it wouldn’t do any good. You could say it was unfair, and that was true, but the universe didn’t care because it didn’t know what “fair” meant. That was the big problem about being a witch. It was up to you. It was always up to you.” 
-Terry Pratchett, Wintersmith