H5406. nishtevan
נִשְׁתְּוָן noun [masculine] letter (usually derived from Persian , i.e. writing, HoffmZA ii (1887), 52 yet compare MeyerJudenthum 22); — absolute ׳נ [Ezra 4:7]; [7:11].
נתב (√ of following; Arabic swell forth, become prominent, protuberant, Lane2760).