Section Six: identical, cognate and close sounds; complete/partial idghām, article lām and exceptions Read the bilingual lesson for Idghām: Types, Complete/Incomplete Assimilation and the Definite Article and test your understanding with a focused quiz.
Lesson
1. What idghām means
Idghām is to merge the pronunciation of an earlier consonant into the next. Two written consonants do not automatically imply assimilation; their relation and the reading rule both matter.
The book first classifies mithlayn (identical), mutajānisayn (same articulation group), mutaqāribayn (close), then distinguishes complete and incomplete assimilation and explains exceptions requiring clear articulation.
2. Mithlayn: identical letters
Idghām of identical letters involves two instances of the same consonant. The source illustrates it with إِذْ ذَهَبَ: the final sākin dhāl meets another dhāl.
Pronounce the junction as an assimilated sound, not two separated attacks. Yet identical letters are not assimilated in every context—for instance when the first is a long-vowel letter.
3. Mutajānisayn: shared articulation
Mutajānisayn are different consonants classified at the same articulation place. In وَقَالَتْ طَائِفَةٌ, the tāʾ and ṭāʾ form the example.
The defining point is their articulatory relationship, not simply that they “sound similar.” Assimilation changes the junction; preserve the reading as transmitted instead of forcing an independent release of the earlier tāʾ.
4. Mutaqāribayn: neighboring sounds
Mutaqāribayn are different consonants with close, rather than identical, articulation positions. The source gives أَلَمْ نَخْلُقْكُمْ for qāf meeting kāf.
Contrast: identical consonant pairs are mithlayn; different letters with a shared articulation are mutajānisayn; nearby positions are mutaqāribayn. Whether assimilation actually occurs is a further question.
5. Complete assimilation
In complete idghām, the earlier consonant is assimilated so its independent distinguishing articulation does not remain. The book cites قُلْ رَبِّ and وَقَالَتْ طَائِفَةٌ.
Let the second consonant govern the combined sound. Avoid producing the first fully and then starting the second afresh; that would defeat assimilation.
6. Incomplete assimilation
In incomplete idghām, the first consonant merges but some feature of it remains. In مَنْ يَقُولُ and مِنْ وَالٍ, the nūn loses independent articulation while ghunnah remains.
Do not equate retained nasal resonance with a separately pronounced full nūn. It is a surviving quality of the assimilated sound.
7. How to distinguish complete and partial
Ask two different questions: What is the relationship between the consonants? That gives identical/cognate/nearby. Does any feature of the first survive assimilation? That gives complete/incomplete.
In مَنْ يَقُولُ the retained nasal quality marks partial assimilation; in قُلْ رَبِّ the independent lām articulation does not survive, illustrating complete assimilation.
8. Sākin first letter and examples
The book lists assimilating junctions where an initial sākin consonant meets an appropriate following sound: وَقَالَتْ طَائِفَةٌ، إِذْ ظَلَمُوا، إِذْ ذَهَبَ، قَدْ تَبَيَّنَ، قَدْ دَخَلُوا.
Examine the word boundary, then rehearse the pair in connected reading. A pause before the second word removes the very junction under study.
9. Lām at assimilation junctions
The source includes junctions like قُلْ رَبِّ and بَلْ رَفَعَهُ, with lām assimilating into a following rāʾ during connection.
That does not mean every lām assimilates before every consonant. The book names قُلْنَا as a case in which lām is not assimilated into nūn. Apply the actual rule for the pair.
10. Do not absorb long-vowel wāw or yāʾ
The text excludes two consecutive wāws or yāʾs when the first functions as a long-vowel letter, as in قَالُوا وَهُمْ and فِي يَوْمٍ.
Preserve the first vowel length instead of swallowing it merely because the following written consonant has the same shape. Look at the sound’s function, not only letter identity.
11. Clear articulation: throat-letter cases
The text illustrates clear pronunciation (iẓhār) in cases including لَا تُزِغْ قُلُوبَنَا and فَاصْفَحْ عَنْهُمْ. Nearby articulations do not automatically justify merging sounds.
When the source requires iẓhār, release the first consonant at its proper articulation rather than absorbing it into the next.
12. Lām of the definite article
The article الـ has two patterns. Before moon letters, its lām is pronounced distinctly; before sun letters, it assimilates into the following consonant.
Compare الْقَمَر (audible lām) and الشَّمْس (lām absorbed into shīn). The article has its own systematic rule.
13. Fourteen moon letters
The book’s memory phrase is اِبْغِ حَجَّكَ وَخَفْ عَقِيمَهُ. Its 14 moon letters are ء ب غ ح ج ك و خ ف ع ق ي م ه. Before any of them, the article’s lām is sounded.
Practice الْقُرْآن and الْعَلِيّ with a separate lām. Do not invent a doubled qāf or ʿayn by omitting that consonant.
14. Moon-letter examples from the book
The book supplies examples across the set: الْآنَ، الْبَخْل، الْغُرُور، الْحَسَنَة، بِالْجُنُود، الْكَوْثَر، الْوَاقِعَة، الْخَاسِرِينَ، الْفَائِزُون، الْعَلِيّ، الْقَانِتِينَ، الْيَوْم، الْمُحْسِنَات.
In each, actually pronounce the lām before moving to the following consonant. Recognizing the letter list without producing the sound is not enough.
15. Fourteen sun letters
The 14 sun letters are ت ث د ذ ر ز س ش ص ض ط ظ ل ن. When the article precedes them, its lām has no separate sound; the following consonant is pronounced in assimilated/geminated fashion.
In الشَّمْس hear the strengthened shīn; in النَّجْم hear the strengthened nūn. The lām remains written but is not independently released in connected speech.
16. Sun-letter examples from the source
Source examples include وَالصَّافَّات، وَالذَّارِيَات، الثَّاقِب، الدَّاعِي، التَّابِعُون، السَّاكِنِينَ، الرَّحْمَٰن، الشَّمْس، وَلَا الضَّالِّين، الطَّارِق، الظَّالِمِين، اللَّه، النَّجْم.
Find the letter after the article, suppress the separate lām sound, and realize the next letter with its proper quality. For وَلَا الضَّالِّين, correct ḍād articulation still matters.
17. Contrast moon and sun lām
Practice paired contrasts: الْقَمَر / الشَّمْس, الْيَوْم / النَّجْم, الْخَاسِرِينَ / الرَّحْمَٰن. The first in each pair has a separately heard lām; the second has assimilation into the sun letter.
For each pair, first decide whether the lām is audible, then check the following consonant’s proper articulation and qualities.
18. Further incomplete-assimilation cases
The text calls the assimilation of sākin nūn or tanwīn into yāʾ and wāw incomplete because ghunnah remains. It also names ṭāʾ into tāʾ as an incomplete case where a characteristic persists.
For أَلَمْ نَخْلُقْكُمْ, the book notes a partial reading as possible but says complete assimilation is preferable. Do not extend that specific observation to every close-letter pair.
19. Recorded variants in two openings
The book reports both iẓhār and idghām for the openings نٓ وَالْقَلَمِ and يسٓ وَالْقُرْآنِ. This is a discussion of transmitted readings, not a license for arbitrary switching.
Apply the established recitation being studied under a qualified teacher. The learning point is to recognize the named special cases rather than imposing a simplified universal rule.
20. Saktah prevents assimilation
The source names عِوَجًا ۜ قَيِّمًا (al-Kahf), مَنْ ۜ رَاقٍ (al-Qiyāmah) and بَلْ ۜ رَانَ (al-Muṭaffifīn) as cases where saktah yields clear articulation. Saktah is a brief stop in sound without the ordinary breath for a full pause.
The interrupted connection prevents straightforward assimilation. Do not classify from the adjacent written letters alone.
21. Marqadinā hādhā and ʿiwajā
The discussion also names مَرْقَدِنَا ۜ هَٰذَا (Yā-Sīn). For عِوَجًا ۜ قَيِّمًا, it explains the pause-like treatment of tanwīn with an alif sound at the saktah.
Its notes mention variant transmitted routes. Learners should follow their chosen established transmission rather than switch unpredictably between pausing and connecting at these special locations.
22. Do not erase separate consonants
The source offers أَغْنَيْنَا، شِرْكِكُمْ، يَحْيَى، دَاوُد as examples of non-assimilated similar sounds requiring careful clarity. Do not let a necessary sound disappear.
It likewise illustrates other non-assimilating junctions with قَدْ جَاءَ، قَدْ ضَلُّوا، إِذْ تَقُولُ، إِذْ زُيِّنَ. Nearby articulations alone do not entitle the reader to merge them.
23. Protect weak and emphatic sounds
The book warns about clusters of weak sounds, weak consonants near strong ones, and adjacent emphatic consonants. Examples include جِبَاهُهُمْ and مُضْطَرّ.
Do not drop a feature simply to recite faster. Preserve the identity of the emphatic consonant and of the neighboring sound. This section teaches careful iẓhār as well as idghām.
24. Geminated and look-alike sounds
The final warning concerns geminated or closely adjacent sounds, with examples such as ذُرِّيَّتَهُ، مُطَهَّرِينَ. It also cautions against flattening distinct consonants that seem alike, including س/ص، ت/ط، ذ/ظ، د/ض، ز/ذ.
Small-looking letter differences may represent major distinctions in articulation or qualities. Tajwīd requires both correct assimilation and correct separate pronunciation.
25. End-of-level self-check
Check five decisions: classify إِذْ ذَهَبَ; explain وَقَالَتْ طَائِفَةٌ; identify the retained feature in مَنْ يَقُولُ; contrast الْقَمَر / الشَّمْس; and explain the saktah in مَنْ ۜ رَاقٍ.
State the rule aloud and read each example slowly. Quizzes test recognition; accurate sound production still benefits from listening to a proficient teacher or reference recitation.
Practice questions
Question 1
How many fundamental letter relationships for idghām does the book name?
Question 2
Two identical consonants form which class?
- Mutaqāribayn
- Ikhfāʾ
- Mutajānisayn
- Mithlayn
Question 3
The relation of ذْ + ذ in إِذْ ذَهَبَ?
- Same articulation, different letters
- Close articulation
- Identical
- Moon-letter pattern
Question 4
Two different letters sharing one articulation group are?
- Sun letters
- Madd letters
- Mithlayn
- Mutajānisayn
Question 5
What is the assimilating pair in وَقَالَتْ طَائِفَةٌ?
- Lām and tāʾ
- Qāf and alif
- Tāʾ and ṭāʾ
- Fāʾ and tāʾ marbūṭah
Question 6
What is the relation between qāf and kāf in أَلَمْ نَخْلُقْكُمْ?
- Neighboring articulations
- Same place
- Identical
- Throat-clear articulation
Question 7
What happens to the first consonant in complete idghām?
- Always kasrah
- Always lengthened
- It remains independently pronounced
- It assimilates with no independent feature remaining
Question 8
What marks incomplete idghām?
- Both must be graphically identical
- A feature of the first persists
- Insert a pause
- The lām has kasrah
Question 9
What feature persists in مَنْ يَقُولُ?
- Qalqalah
- Istiṭālah
- Tafashshī
- Ghunnah
Question 10
Which quality of idghām is قُلْ رَبِّ used to illustrate?
- Moon-lām clarity
- Incomplete
- Complete
- Only saktah
Question 11
When the first wāw is a long-vowel sound in قَالُوا وَهُمْ?
- Always saktah
- Preserve its long-vowel sound
- Swallow it into the next wāw
- Delete alif
Question 12
What error should be avoided in فِي يَوْمٍ?
- Dropping the long yāʾ
- Changing tanwīn to fatḥah
- Sounding lām
- Softening qāf
Question 13
What does the text say about lām in قُلْنَا?
- Lām is a long vowel
- Do not assimilate it into nūn
- Always assimilate into nūn
- Drop lām and make saktah
Question 14
What happens when a moon letter follows the article lām?
- Saktah is obligatory
- The lām is pronounced
- The lām is deleted
- Nūn gets ḍammah
Question 15
How is the lām read in الْقَمَر?
- With saktah
- Assimilated into qāf
- Pronounced clearly
- As madd alif
Question 16
The book’s memory phrase for moon letters?
- Quṭbu jadd
- Faḥaththu shakhsun sakat
- Yarmalūn
- Ibgḥi ḥajjaka wa khaf ʿaqīmah
Question 17
Which is a sun letter?
Question 18
What happens to article lām in الشَّمْس?
- Assimilated into shīn
- Becomes hamzah
- Pronounced independently
- Becomes nūn
Question 19
What sun letter follows the article in النَّجْم?
Question 20
How many letters are in the moon and sun lists together?
- Twenty-eight
- Fourteen
- Twenty-four
- Fifteen
Question 21
Which reading does the book prefer in أَلَمْ نَخْلُقْكُمْ?
- Saktah in all cases
- Always iẓhār
- Alif lengthening
- Complete idghām
Question 22
What does the text report for نٓ وَالْقَلَم and يسٓ وَالْقُرْآن?
- Only qalqalah
- Both clear and assimilated transmitted readings
- Saktah is the only rule
- Necessary madd is forbidden
Question 23
Why is idghām interrupted in مَنْ ۜ رَاقٍ?
- Saktah
- Tanwīn on nūn
- Rāʾ is a moon letter
- There is a madd yāʾ
Question 24
Which exceptional discussion includes بَلْ ۜ رَانَ?
- Saktah and clear articulation
- Only tafkhīm
- Grades of ghunnah
- Pronoun hāʾ
Question 25
Why is مَرْقَدِنَا ۜ هَٰذَا mentioned?
- Long-vowel idghām
- As a particular saktah location
- As nūn before bāʾ
- As a sun lām
Question 26
How should nearby letters be read without a transmitted idghām?
- Merge them everywhere
- Use saktah everywhere
- Clearly preserving each consonant
- Drop one consonant
Question 27
How does the book use قَدْ جَاءَ?
- Practice clear articulation without forced assimilation
- Only madd munfaṣil
- Pronoun ṣilah
- Sun-letter lām
Question 28
What is the key caution in a word such as مُضْطَرّ?
- Preserve features of emphatic/adjacent consonants
- Assimilate article lām
- Delete ṭāʾ
- Make every consonant sākin
Question 29
What final caution includes ذُرِّيَّتَهُ?
- Only definite article lām
- Basmala in al-Barāʾah
- Clearly pronounce geminated and adjacent sounds
- Pronoun ṣilah
Question 30
Which sequence best decides an idghām question?
- From meaning alone
- Letter relation, condition, then exceptions/transmission
- From word length only
- Assimilate whenever two letters meet
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