In عَابِدٌ مَّا tanwīn functions as a nūn sākinah, followed by mīm. Since mīm is among the letters of idghām with ghunnah, the nūn sound merges into the mīm with nasal resonance.
Read «عَابِدٌ» in isolation and then connect «عَابِدٌ مَّا». Do not insert a fully articulated extra nūn in the connected reading.
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ʿĀbidun mā: merging tanwīn into mīm
Al-Kāfirūn and An-Naṣr: Applied Madd, Idghām, Ghunnah and Waqf
In عَابِدٌ مَّا tanwīn functions as a nūn sākinah, followed by mīm. Since mīm is among the letters of idghām with ghunnah, the nūn sound merges into the mīm with nasal resonance.
Read «عَابِدٌ» in isolation and then connect «عَابِدٌ مَّا». Do not insert a fully articulated extra nūn in the connected reading.