Strong's #5407: nishtvan (pronounced nish-tev-awn')
(Aramaic) corresponding to 5406:--letter.
Brown-Driver-Briggs Hebrew Lexicon:
ּׁ (Aramaic)
nishtevân
1) letter
Part of Speech: noun masculine
Relation: corresponding to H5406
Usage:
This word is used 3 times:
Ezra 4:18: " The letter which ye sent unto us hath been plainly read before"
Ezra 4:23: "when the copy of king Artaxerxes' letter was read before Rehum,"
Ezra 5:5: "to Darius: and then they returned answer by letter concerning this"