This study embarks on an exhaustive exploration of the intricate interplay between societal dynamics and the evolution of thought within communities, with a specific focus on the Old Turkish language. Through a multidimensional lens, this study meticulously investigates the profound impact of Sanskrit on the linguistic development of Turkish, particularly within the realms of belief systems. The research endeavours to unravel the nuanced processes through which new words emerge within the Turkish lexicon, probing the dichotomy between organic linguistic evolution and intentional lexical contributions by individuals. At its core, this study grapples with the perennial question of whether language serves as a medium shaping human thought or if entrenched thought patterns, in turn, give rise to language.

The study begins by postulating that the expressive capability of language is fundamental to human cognition, positing that every thought and emotion finds its most accurate and accessible expression through language. At the heart of this linguistic exploration are words, the elemental building blocks of language, which serve to concretise abstract concepts in the realm of human consciousness. Grounded in a thorough examination of written texts, this research discerns and identifies words to unveil the prevailing thought patterns embraced by a specific community, shedding light on the intricate interdependence of language and thought.

Central to this study is the argument that language, with its structures and nuances, plays a pivotal role in shaping human perspectives and worldviews. Drawing inspiration from the early linguists who delved into the relationship between language and thought, this research systematically explores Abhidharma texts, a genre revered for its intersection of language and philosophy. Against the backdrop of Turkish civilisation, one of the world’s oldest, the study contends that the Turks possess a rich cultural heritage deeply rooted in a profound connexion to nature and a distinctive worldview.

A significant segment of the research delves into the linguistic metamorphosis of the Old Uighur community, especially after their transition to a settled urban life influenced by Buddhism and Manichaeism. This thesis meticulously examines the integration of Sanskrit into the Uighur written language, notably within the Abhidharma texts, seeking to unveil the intricate dynamics of its impact on Turkish thought and expression.

This study meticulously highlights the linguistic contributions of Sanskrit to the Turkish language, showcasing how Sanskrit words, particularly those embedded in Abhidharma texts, were seamlessly integrated into the fabric of the Uighur language. This assimilation of Sanskrit terms into the religious and philosophical discourse of the Turks serves as a compelling testament to the dynamic relationship between language and thought.

In exploring the cultural context of Turkish civilisation, the research elucidates the profound connexion between language, thought, and societal values. This study contends that as a living repository of cultural identity, language is not merely a tool for communication but a vessel that carries the collective wisdom, beliefs, and aspirations of a community. In this regard, the research delves into the linguistic kaleidoscope of the Turkish people, deciphering how words reflect the ebb and flow of historical, social, and philosophical currents.

Moreover, the thesis expands its inquiry into the philosophical underpinnings of Abhidharma texts, exploring how the intricate web of Sanskrit terms within these texts has shaped the philosophical landscape of Turkish thought. This study posits that the integration of Sanskrit terms into Turkish religious and philosophical discourse is not merely a linguistic phenomenon but a profound cultural exchange that has enriched the conceptual framework of Turkish intellectual traditions.

As the research unfurls the tapestry of linguistic evolution, it underscores the dynamic nature of language, emphasising its capacity to adapt and assimilate external influences. Sanskrit's assimilation terms into Turkish not only underscores linguistic adaptability but also mirrors the cultural openness of the Turks to diverse intellectual traditions. This study contends that this linguistic assimilation is not a one-sided process; rather, it exemplifies the reciprocal relationship between languages and cultures.

In conclusion, this study underscores the paramount importance of linguistic analysis in unravelling the complexities of thought evolution and the pivotal role that language plays as a reflective mirror of cultural and philosophical nuances within a community. The comprehensive examination of Sanskrit’s influence on Turkish thought not only enriches our understanding of linguistic evolution but also contributes to a broader comprehension of the intricate tapestry of cultural interconnectedness. Through this scholarly endeavour, the research aims to deepen our appreciation for the profound ways in which language serves as a vessel for the transmission and preservation of thought across diverse civilisations and epochs. Ultimately, this study serves as a testament to the enduring dialogue between Sanskrit and Turkish, weaving together the threads of linguistic heritage and intellectual traditions in the rich tapestry of human civilisation.