Nit

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Old English hnitu, of West Germanic origin; related to Dutch neet and German Nisse .

wiktionary

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From Middle English nite, from Old English hnitu, from Proto-Germanic *hnits (compare Dutch neet, German Nisse, Norwegian nit), from Proto-Indo-European *-níd- (compare Scottish Gaelic sneadh, Lithuanian glìnda, Polish gnida, Albanian thëri, Ancient Greek κονίς(konís))

From Latin nitēre(“to shine”).

nit (plural nits)

nit (plural nits)

etymonline

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nit (n.)

"louse egg," Middle English nite, from Old English hnitu, from Proto-Germanic *hnitu- (source also of Norwegian nit, Middle Dutch nete, Dutch neet, Middle High German niz, German Niß), from PIE root *knid- "egg of a louse" (source also of Russian, Polish gnida, Czech knida; Greek konis, genitive konidos "egg of a louse").