Of uncertain derivation; a sheath (of a sword) -- sheath.
H5084. nadan
II. [נָדָן] noun [masculine] sheath (Late Hebrew id.; Aramaic נִדְנָא (ᵑ7 Talmud); Persian loan-word NöGGA, 1884, 1022); — אֶלנְֿדָנָהּ׃ חַדְבּוֺ וַיָּשֶׁב 1 Chronicles 21:27.