Saeed Abdullah Al-KathiriHasan Salem Habshan2026-01-092026-01-092025-12-25Abdullah Al-Kathiri, S., & Salem Habshan, H. (2025). تبادل التأثير وتداخل النظريات بين علم التجويد وظواهر الرسم العثماني: Reciprocal Influence and Theoretical Convergence between Tajwīd and the Phenomena of the ʿUthmānī Script. Maʿālim Al-Qurʾān Wa Al-Sunnah, 21(2), 137–157. https://doi.org/10.33102/jmqs.v21i2.5502637-032810.33102/jmqs.v21i2.550https://jmqs.usim.edu.my/index.php/jmqs/article/view/550/325https://oarep.usim.edu.my/handle/123456789/28444Maʿālim Al-Qurʾān Wa Al-Sunnah, Volume 21 Issue 2 Page (137–157)Exploring relationships among disciplines is a productive avenue for advancing scholarship across diverse fields. Against this backdrop, the present study examines the nature of the relationship between the science of Tajwīd and the phenomena of the ʿUthmānī script (Ottoman orthography). The study argues that the connection between these two sciences is both close and multidimensional, appearing in several forms that reveal reciprocal influence and theoretical convergence. It aims to elucidate the points of interconnectedness and overlap between Tajwīd rulings and orthographic phenomena in the ʿUthmānī script, thereby contributing to greater conceptual precision and stronger methodological grounding in both domains. Adopting a descriptive–analytical approach, the researchers trace relevant materials that address orthographic phenomena shaped by Tajwīd principles, then analyse and discuss them systematically to reach the study’s objectives. The findings indicate that the science of the ʿUthmānī script functions as a foundational framework within which Tajwīd is transmitted and operationalized, while Tajwīd, in turn, informs how certain orthographic conventions are interpreted and taught. The relationship is therefore best characterized as mutually reinforcing, marked by tightly interwoven rules that are difficult to disentangle—so much so that the two disciplines may be described as closely related “sister fields.” This interrelationship is illustrated, for example, by the way Tajwīd rules such as ikhfāʾ (concealment) and idghām (assimilation) are linked to orthographic phenomena such as omission (ḥadhaf) and addition (ziyadah) within the ʿUthmānī script tradition.ArrulesrelationshipphenomenadeletionTajwīdʿUthmānī scriptjournal-article137157212