Dating Written Thai by the Diachronic Data of Comitatives /dûaj/ and /kàp/
Main Article Content
Abstract
This research proposes periodization of written Thai by comparing the evolution of two comitative prepositions, /dûaj/ and /kàp/. The methodology is to rearrange the diachronic data using the AntConc toolkit and to consider the usage in three dimensions: orthography, syntax, and meaning. The results show that written Thai should be separated into three periods: Old Written Thai (OWT, 13th to 16th century), Middle Written Thai (MWT, 17th to 19th century) and Modern Written Thai or Standardized Written Thai (SWT, 20th century to the present day). This result may differ from previous research, which periodizes by the dominant cities or the capital cities. In terms of orthography, the two words changed the position of the vowel and tone marker from the second to the first alphabet in the early 19th century. In OWT, /dûaj/ is the general preposition of comitative and other related meanings, while /kàp/ is common as a noun phrase conjunction and a goal marker. The two words, /dûaj/ and /kàp/, overlapped in MWT and eventually /kàp/ became dominant for comitative functions in the mid 19th century and tended to overcome more functions of /dûaj/ in the future.
Article Details

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
References
Bandhumedha, D. (1986). The use of conjunctions in the Ratanakosin period. Ph.D. dissertation, Department of Thai, Chulalongkorn University.
Changkhwanyuen, P. (1972). Thai prose usage in the Ayudhya period. Master’s thesis in Thai, Graduate School, Chulalongkorn University.
Jampathip, N. (2014). The development of the negators “bo” “mi” “pai” “mai” in Thai. Ph.D. dissertation, Department of Linguistics, Chulalongkorn University.
Jaratjarungkiat, D. (2000). Discourse connectors in Thai from the Sukhothai period to the present. Ph.D. dissertation, Department of Thai, Chulalongkorn University.
Kouteva, T., Heine, B., Hong, B., Long, H., Narrog, H., and Rhee, S. (2019). World lexicon of grammaticalization (2nd ed.). Cambridge: Cambridge University Press.
Lehmann, C. (1992). Yukatekische lokale Relatoren in typologischer Perspektive. STUF - Language Typology and Universals, 45(1-4), 626-643. https://doi.org/10.1524/stuf.1992.45.14.626
Meesat, P. (1995). A study of auxiliary verbs developed from verbs in Thai. Master’s thesis in Thai, Department of Thai, Chulalongkorn University.
Nuchpraharn, K. (2022). The development of the word /kàp/ in Thai. Ph.D. dissertation, Department of Thai, Chulalongkorn University.
Paholayuth, N. (1983). The use of prepositions in the Sukhothai, Ayudhya, and Ratanakosin periods: A comparative study. Ph.D. dissertation, Department of Thai, Chulalongkorn University.
Pothipath, V. (2023). Comitatives and instrumentals in Thai: A diachronic typological perspective. Manusya: Journal of Humanities, 26(1), 1-20. https://doi.org/10.1163/26659077-26010001
Sanah, N. (2013). Grammaticalization of /dûaj/. Master’s thesis in Thai, Department of Thai, Chulalongkorn University.
Sriprasit, M. (2003). A diachronic study of /laeaew/, /yuu/, and /yuulaeaew/. Master’s thesis in Thai, Department of Thai, Chulalongkorn University.
Stolz, T., Stroh, C., and Urdze, A. (2006). On comitatives and related categories: A typological study with special focus on the languages of Europe. Berlin: De Gruyter Mouton.
Stolz, T., Stroh, C., and Urdze, A. (2013). Comitatives and instrumentals. In M. S. Dryer and M. Haspelmath, (eds.). WALS Online (v2020.4) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.13950591
Tawichai, S. (2020). The preposition /kὲ:/: A historical study. Ph.D. dissertation, Department of Thai, Chulalongkorn University.
Thanyawong, S. (2023, October). Language in digital view. Database presented at “Arts Seminar,” Faculty of Liberal Arts, Thammasat University, Rangsit Campus.
Thanyawong, S. (2024). Dating old Thai texts using functions of polyfunctional words. Ph.D. dissertation, Department of Linguistics, Chulalongkorn University.
Yaowapat, N. (2008). The development of the multiple functions of /sin/ in Thai. Ph.D. dissertation, Department of Linguistics, Chulalongkorn University.
Websites
Department of Linguistics, Faculty of Arts, Chulalongkorn University. (2013). Thai National Corpus (Third Edition). Retrieved December 17, 2024, from https://www.arts.chula.ac.th/ling/tnc3/
National Library. (n.d.). Manuscript collections. Retrieved December 17, 2024, from https://manuscript.nlt.go.th/
Sirindhorn Anthropology Centre. (n.d.). Inscriptions in Thailand. Retrieved December 17, 2024, from https://db.sac.or.th/inscriptions/
Sirindhorn Anthropology Centre. (n.d.). Manuscripts of Thailand. Retrieved December 17, 2024, from https://db.sac.or.th/manuscriptsofthailand/
Sirindhorn Anthropology Centre. (n.d.). Old book collections. Retrieved December 17, 2024, from https://db.sac.or.th/siamrarebooks/books
Thammasat University Library. (n.d.). TU digital collections. Retrieved December 17, 2024, from https://digital.library.tu.ac.th/tu_dc/frontend/
Vajirayana Digital Library. (n.d.). Vajirayana. Retrieved December 17, 2024, from https://vajirayana.org/