Idgham Without Ghunnah is a rule in Tajweed, the art of Quranic recitation, where a letter is merged into another without a nasal sound. This occurs specifically when the letter ر (ra) or ل (lam) follows one of the letters of ن (noon) or م (meem) in certain contexts. In this case, the sound of the first letter is absorbed into the second, creating a smooth transition. This technique enhances the flow of recitation and is essential for proper pronunciation, ensuring clarity and beauty in the reading of the Quran.