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English word nithered comes from English nither, English -ed
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nither (English)
-ed (English)
Used to form past participles of (regular) verbs. See -en and -t for variants. Used to form past tenses of (regular) verbs. In linguistics, it is used for the base form of any past form. See -t for a variant. Used to form adjectives from nouns, in the sense of having the object represented by the noun.. As an extension of the above, when used along with an adjective preceding the noun, [...]
nithered (English)
(Scotland, Northern England) Very cold; shrivelled with cold. [from 17th c.].