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Erroneous form of nithing, originating in the early printed text (1596) of William of Malmesbury, by misreading niðing as nid'ing (= nidering).
The modern use of the word is due to Sir Walter Scott who used nidering in Ivanhoe in 1819.
From: A Treatise of Gavelkind, Both Name and Thing.
By William Somner.
The Second Edition, 1726