"making a sullen roar" (as the wind does), Northern England dialectal variant of Scottish and dialectal whithering "rushing, whizzing, blustering," from a verb whither (late 14c.) which was used in reference to gusts of wind and coughing fits, from Old Norse *hviðra (related to Norwegian kvidra "to go quickly to and fro," Old English hwiþa "air, breeze").Charlotte also used forms of the word in her novels.