Final answer:
Idghaam as-sagheer al-waajib al-mithlain is a concept in Tajweed where two like letters merge; the first letter has a sukoon, and the second letter has a shaddah. This rule aids in the correct pronunciation of the Quranic Arabic text.
Step-by-step explanation:
The student's question regards Idghaam as-sagheer al-waajib al-mithlain, which is a concept in Tajweed, the art of reciting the Quran. Idghaam involves the merging of two like letters where the first letter has a sukoon (a non-vocalized letter) and the second has a shaddah (which signifies a doubling of the letter). For instance, the word ran-inna involves the idghaam of two 'n' letters (ن). The first condition is that the nasal letter has a sukoon, and the second condition is that the following letter has a shaddah. Tajweed rules are essential for the correct pronunciation of the Quranic text, which was revealed in the Arabic language and is read from right to left. The Mushaf, a written copy of the Quran, includes various diacritical marks to aid proper pronunciation.