Homorganic and Near Letters — Difference in Idghaam with Quranic Examples

Homorganic Letters (Mutajaanisaan):
Two letters sharing the same articulation point but differing in attributes. Example: daal, taa, and taa — same articulation point (tip of tongue) but differ in voicing, aspiration, and elevation.

Idghaam of Homorganic Letters:
When a sukoon homorganic letter precedes its partner, it merges into it — complete or incomplete. Examples:

• "Qad tabayyana" (Al-Baqarah: 256) — sukoon daal + taa = homorganic merging without ghunna.
• "Idh thalamtum" (Al-Zukhruf: 65) — dhaal + dhaa = homorganic merging.

Near Letters (Mutaqaaribaan):
Two letters close in articulation point or attributes. Example: noon and meem (close in attribute), laam and raa (close in articulation).

Idghaam of Near Letters:
Example: "Bal rafaahu" (Al-Nisa: 158) — sukoon laam + raa = near-letter merging (laam disappears into raa).

Practical Difference:
In homorganic merging the first letter disappears but may leave a trace (incomplete idghaam). Near-letter merging is similar. Neither involves ghunna, unlike noon-sukoon merging into yaa and waaw.