different between weathering vs whithering

English

From Middle English wederyng, equivalent to weather +? -ing.

weathering (countable and uncountable, plural weatherings)

(obsolete) Weather, especially favourable or fair weather.
(geology) Mechanical or chemical breaking down of rocks in situ by weather or other causes.
(architecture) A slight inclination given to an approximately horizontal surface to enable it to throw off water.

weathering

whithering

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