General idghām includes identical letters, homogeneous letters, and closely articulated letters. But nearness of sounds alone does not authorize assimilation everywhere; the transmitted rule and exceptions matter.
For the definite article:
الْقَمَرُ — lunar lām, pronounced clearly.
الشَّمْسُ — solar lām, assimilated into the following letter.
Special Qurʾānic instances of saktah may alter the usual connection. Determine the rule through the written form, word boundaries, and the specific reading being followed.
Opening interactive controls...
General idghām and the article al-
Comprehensive Revision — Applying Tajwīd Rules
General idghām includes identical letters, homogeneous letters, and closely articulated letters. But nearness of sounds alone does not authorize assimilation everywhere; the transmitted rule and exceptions matter.
For the definite article:
الْقَمَرُ — lunar lām, pronounced clearly.
الشَّمْسُ — solar lām, assimilated into the following letter.
Special Qurʾānic instances of saktah may alter the usual connection. Determine the rule through the written form, word boundaries, and the specific reading being followed.