An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

1) A symbol or character representing a sound of which words are formed used in writing and printing a language.
2) A written or printed communication addressed to a person or organization.

M.E., from O.Fr. letre "character, letter; missive," from L. littera "letter of the alphabet," litterae (plural) "epistle, literature"

1) Vât "letter, word," from vat- "to speak, say;" cf. (Kurd.) wittin "to speak, say," → article, (Nâyin) vâte, (Qohrud) vâta, (Sangesar) -vât-/vân, (Zazaki) vâtiš, (Awromani) wâtay/wâc-, (Farizand) -vât/-vaj, (Gaz) vâ-/vât, related to Pers. vâžé "word;" Mid.Pers. vâc, vâcak "word, speech;" âva "voice, sound," âvâz "voice, sound, song," bâng "voice, sound, clamour" (Mid.Pers. vâng); Av. vacah- "word," vaocanghê "to decalre" (by means of speech), from vac- "to speak, say;" cf. Skt. vakti "speaks, says," vacas- "word;" Gk. epos "word;" L. vox "voice;" PIE base *wek- "to speak."
2) Nâmé, → book.