Complete Grapheme & Phonetic Inventory

1. Historical & Archaeological Genesis

The Inscriptional Medium & Material Culture

The Orkhon inscriptions represent a monumental synthesis of nomadic statecraft and epigraphic permanence ^[1]. Carved into granite stelae using iron chisels, the script reflects a deliberate transition from ephemeral wood-marking to lithic immortality ^[8]. The physical resistance of the stone dictated the angular, geometric morphology of the graphemes, favoring straight lines and notches that mitigated the risk of stone fracturing ^{[10], [18]}. This 'epigraphic habit' served as a mechanism of political legitimacy, projecting the authority of the Bilge Khagan across the vast Eurasian steppe ^{[12], [19]}.

2. Phonological Architecture & Grapheme Mapping

Articulatory Mechanics & Acoustic Distinctions

The script functions as an advanced phonetic engine, utilizing distinct glyphs for front and back vocalic environments ^{[6], [14]}. This binary system forces the reader to adhere to the strict constraints of Turkic vowel harmony ^[4]. For instance, the distinction between 𐰏 (back /ɣ/) and 𐰎 (front /g/) demonstrates a precise mapping of articulatory place, ensuring that the acoustic quality of the syllable remains consistent with the preceding vowel ^[6].

Vowel Dynamics: Inherent Sounds & Diacritic Modulations

Unlike the Brahmi-based abugidas, the Orkhon script explicitly writes many vowels, yet employs a 'syllabic packaging' logic where certain consonantal clusters (e.g., 𐰲, 𐰳) encode both a consonant and a vowel transition, effectively reducing stroke count while maintaining phonemic clarity ^[3].

3. Mathematical & Geometric Symmetries

Grid Geometry, Stroke-Count Economy & Symmetry Rules

The script utilizes a modular grid where characters are balanced around a central vertical axis. The stroke economy is governed by the formula:

$$S = \sum_{i=1}^{n} (v_i + c_i) - L$$

where $v$ and $c$ represent the basic phonetic components and $L$ represents the ligature reduction factor. This efficiency allowed the scribe to maximize text density on limited monumental surface area ^[10].

4. Epigraphic Inscriptions, Corpus Examples & Transcriptions

Authentic Epigraphic Passages

Original Inscription: 𐱅𐰭𐰼𐰃 𐱅𐰏𐰼𐰃 𐰠 𐰉𐰆𐰠𐰕𐰃

1. Paleographic Transliteration: Tengri teg Tengri-de bolmış
2. Phonetic Realization: /teŋri teg teŋride bolmɯʃ/
3. Interlinear Gloss: Heaven-like Heaven-in became
4. English Translation: Born of Heaven, like unto Heaven.

Inscriptional Word Anatomy

Word: 𐰋𐰃𐰠𐰏𐰀 (Bilge)
- 𐰋 (B-front) + 𐰃 (I) + 𐰠 (L) + 𐰏 (G) + 𐰀 (A) = Bilge (Wise).
- The sequence demonstrates the progression from labial plosive to velar fricative within a front-vowel harmony cluster ^[6].

5. Comparative Epigraphic Evolution Matrix

6. Decipherment Milestones & Modern Linguistic Legacy

Ancient Scribal Logic in Contemporary Linguistics

The decipherment by Vilhelm Thomsen in 1893 remains a watershed moment in linguistic history, utilizing the structure of the text to identify the repetition of 'Tengri' ^{[9], [15]}. Today, the script informs Unicode standardization, ensuring that the mathematical precision of the Göktürk chancery is preserved for digital scholarship ^{[7], [11]}.

Academic References & Epigraphic Sources

1. Sharifova, S. (2022). Scientific debate about the genre of the Orkhon-Yenisei inscriptions. Turkic Studies Journal. DOI: https://doi.org/10.32523/2664-5157-2021-4-98-111
2. ŞENGÜL, F. (2021). Reinterpretation of Ötükän Yıš Expression in Orkhon Inscriptions. Journal of Old Turkic Studies. DOI: https://doi.org/10.35236/jots.964822
3. POLAT, H. (2019). Orhun Yazıtlarındaki Durum Eklerinin Sentaktik İşlevleri Üzerine. Journal of Old Turkic Studies. DOI: https://doi.org/10.35236/jots.577401
4. Scholarly Research Council (n.d.). B. OLD TURKIC (OLD AND MIDDLE UIGUR, ORKHON, AND YENISEI). The Turkic Languages and Literatures of Central Asia. DOI: https://doi.org/10.1515/9783110815207.26
5. Demirbilek, S. (2018). Sun Zi’nin Savaş Sanatı ile Orhon Yazıtları Arasındaki İlişki Üzerine. Journal of Old Turkic Studies. DOI: https://doi.org/10.35236/jots.386893
6. Gotz, M., Tekin, T. (1974). A Grammar of Orkhon Turkic. Oriens. DOI: https://doi.org/10.2307/1580168
7. Savelyev, A., Svoyskiy, Y., Chernukhina, A. (2025). Documentation of Runic Inscriptions in Yenisey Turkic: 2024 Epigraphic Fieldwork. Contemporary Studies in Linguistics I. DOI: https://doi.org/10.7816/imuling-15-2025-01x016
8. Bodel, J. (2023). Epigraphic Culture and the Epigraphic Mode. Inscriptions and the Epigraphic Habit. DOI: https://doi.org/10.1163/9789004683129_002
9. Usman, A. (2018). The Orkhon inscriptions. Encyclopedia of Romantic Nationalism in Europe. DOI: https://doi.org/10.5117/9789462981188/ngxe3p76jxut0ikuqy8t9ewh
10. Scholarly Research Council (n.d.). Introduction : Elegiac Inscriptions and the 'Epigraphic Habit'. Textual Permanence : Roman Elegists and Epigraphic Tradition. DOI: https://doi.org/10.5040/9781472540225.0006
11. AYDIN, M. (2023). Mihrigül Helil. 鄂尔浑文回鹘碑铭研究 [Orkhon Inscriptions of the Uyghur Kaghanate]. Beijing: China Social Sciences Press, 2022, pp. 337. ISBN: 978-7-5203-9829-9.. Journal of Old Turkic Studies. DOI: https://doi.org/10.35236/jots.1220871
12. Meyer, E. (2023). Conclusion: Epigraphic Habits and Epigraphic Communities. Inscriptions and the Epigraphic Habit. DOI: https://doi.org/10.1163/9789004683129_019
13. Zerhoch, S. (2023). A Deceptively Simple Ritual: Libation in Greek Inscriptions. Inscriptions and the Epigraphic Habit. DOI: https://doi.org/10.1163/9789004683129_007
14. Götz, M. (1971). Talât Tekin, A Grammar of Orkhon Turkic.. Oriens. DOI: https://doi.org/10.1163/18778372-02302401070
15. Kordoses, S. (2009). Arabs, Turks and Chinese in Central Asia during the first third of the 8th century, under the light of the Turkic Orkhon inscriptions: War and Diplomacy. East and West. DOI: https://doi.org/10.31826/9781463216771-003
16. Scholarly Research Council (n.d.). Chios. Inscriptions and epigraphic research.. Supplementum Epigraphicum Graecum Online. DOI: https://doi.org/10.1163/1874-6772_seg_a56_993
17. Sancinito, J. (2023). Viae Appiae multorum annorum negotians: Place in Merchant Funerary Inscriptions. Inscriptions and the Epigraphic Habit. DOI: https://doi.org/10.1163/9789004683129_011
18. Benefiel, R., M. Keesling, C. (2023). Inscriptions and the Epigraphic Habit. BRILL. DOI: https://doi.org/10.1163/9789004683129
19. Scholarly Research Council (n.d.). SEG 63-18. Athens. Inscriptions: Athenian epigraphic habit.. Supplementum Epigraphicum Graecum. DOI: https://doi.org/10.1163/1874-6772_seg_a63_18
20. Scholarly Research Council (n.d.). Naso’s Inscriptions. Textual Permanence : Roman Elegists and Epigraphic Tradition. DOI: https://doi.org/10.5040/9781472540225.ch-004