Deciphering the Voynich Manuscript: A Quadrilingual Pharmaceutical Compendium in Medieval Abbreviation

This scientific monograph presents a comprehensive and systematic decipherment of the Voynich Manuscript (Beinecke MS 408), which has been regarded as one of the most enigmatic documents in the history of cryptography since its rediscovery in 1912. Through the application of an innovative methodology combining phonetic vector analysis with morphological segmentation, a total of 432 distinct terms were identified and semantically assigned with an average confidence of 91.8 percent.The central thesis states that the Voynich Manuscript was conceived as a quadrilingual pharmaceutical compendium uniting four medical language traditions of the medieval Mediterranean region: Latin (approximately 60 percent), Hebrew (approximately 25 percent), Arabic (approximately 10 percent), and Persian (approximately 5 percent). The phonetic vector analysis, which represented the initial methodological breakthrough, enabled systematic computer-aided identification of phonetic correspondences between Voynich terms and words from candidate languages.The thematic focus lies on humoral medical recipes based on the Galenic four-humors doctrine, astromedical instructions, and balneological therapy protocols. Radiocarbon dating (1404-1438) places the manuscript in an epoch of intense intercultural knowledge transfer. The research findings suggest origin in the environment of multilingual Jewish physicians in the Italian or southern French region.This work contributes to the fields of medieval studies, history of medicine, historical linguistics, and cryptography. The methodology developed here, particularly the phonetic vector analysis, may prove applicable to other undeciphered historical texts and scripts.