Ikhfa Letters: The 15 Letters and How to Pronounce Them

The ikhfa letters are fifteen Arabic letters: ت ث ج د ذ ز س ش ص ض ط ظ ف ق ك. When a noon sākinah (a ن carrying a sukūn) or a tanween comes directly before one of them, the noon is neither pronounced clearly nor fully merged into the next letter — it is concealed and carried on a nasal hum, the ghunnah, for roughly two counts. This page lists all fifteen letters, explains what concealment actually means inside the mouth, and gives a step-by-step method, the mistakes to avoid, and a practice routine you can use between lessons.

This is a close-up on a single rule, so if the four rules of noon sākinah and tanween are still new to you, read our overview of Tajweed rules for beginners first. Everything below assumes you can already tell a noon sākinah from a tanween, and that you know what ghunnah means.

What are the ikhfa letters?

They are the fifteen Arabic letters that trigger ikhfāʾ when they come after a noon sākinah or a tanween. In alphabetical order:

• Group 1: ت (tāʾ), ث (thāʾ), ج (jīm), د (dāl), ذ (dhāl)
• Group 2: ز (zāy), س (sīn), ش (shīn), ص (ṣād), ض (ḍād)
• Group 3: ط (ṭāʾ), ظ (ẓāʾ), ف (fāʾ), ق (qāf), ك (kāf)

Splitting them into three sets of five is deliberate: fifteen letters is a lot to hold in mind at once, but three short rows are easy to recall, and many teachers drill them in exactly this shape. Say each row aloud twice before moving to the next, naming the letter as you say it, so the ear learns the sound and the memory learns the label together.

How do the ikhfa letters differ from izhar, idgham and iqlab?

All four rules of noon sākinah and tanween are decided by one thing only: which letter comes next. Together the four sets cover the whole alphabet, and the fifteen ikhfa letters are simply what remains once the other three groups are set aside.

• Izhār — ء ه ع ح غ خ: six throat letters; the noon is said clearly.
• Idghām — ي ر م ل و ن: six letters; the noon merges into them.
• Iqlāb — ب: one letter; the noon turns into a mīm.
• Ikhfāʾ — the fifteen letters above; the noon is concealed with ghunnah.

Because ikhfāʾ covers more than half the alphabet, it is the rule you will meet most often in real recitation. If you want the other three explained one at a time, our page on Noon Sakinah rules walks through them in order.

Why are these particular letters concealed?

Tajweed manuals explain ikhfāʾ by distance between points of articulation. The noon is a tongue-tip letter. The izhār letters sit far away in the throat, so the tongue has plenty of room to make a clean noon before moving there. The idghām letters are very close to the noon — the tongue or the lips — so the two sounds slide into one another. The fifteen ikhfāʾ letters sit in between: near enough that a full, crisp noon would feel clumsy, not near enough to merge.

The practical result is a middle sound. The noon is not deleted, but it is not clearly heard either; what you actually hear is the hum. Tajweed manuals define ikhfāʾ in words close to this: pronouncing the letter in a manner between clear and merged, without doubling it, while the ghunnah remains.

Concealment does not mean silence. In ikhfāʾ the noon disappears as a consonant and survives as a hum.

How do you pronounce ikhfa step by step?

The method is short, but every step has to happen at once. Work through it slowly on a single pair of letters before you try it at speed.

1. Find the trigger. Look for a noon carrying a sukūn, or for a tanween — the doubled vowel at the end of a word.
2. Check the next letter. If it is one of the fifteen, the rule applies. If it is a throat letter, one of ي ر م ل و ن, or ب, a different rule applies.
3. Hold the tongue back. Instead of pressing the tongue tip against the gum ridge behind the upper teeth for a full noon, keep it loose and let it move towards the position of the coming letter. That is what hides the noon.
4. Send the sound to the nose. The ghunnah is nasal, not oral: keep the mouth relaxed and let the hum resonate behind the nose.
5. Hold about two counts. Long enough to be clearly heard, short enough that it does not become a separate drawn-out letter.
6. Release straight into the next letter without a pause, without a second noon, and without doubling the letter that follows.

A few everyday examples, each built on a noon sākinah or a tanween, show the shape of it:

• مَنْ صَبَرَ (man ṣabara) — noon sākinah before ص
• مِنْ كُلِّ (min kulli) — noon sākinah before ك
• مَنْ جَاءَ (man jāʾa) — noon sākinah before ج
• رَجُلٌ كَرِيمٌ (rajulun karīmun) — tanween before ك
• بَيْتٌ صَغِيرٌ (baytun ṣaghīrun) — tanween before ص

In every one of them the written n is not what you hear. What you hear is a hum that carries you into the following letter.

How long should the ghunnah last, and where does it resonate?

About two counts — roughly the length of one slow, deliberate vowel. The resonance belongs in the nose (the khayshūm), not in the mouth and not in the throat; if the hum feels as though it is sitting between your teeth or in your chest, it is in the wrong place.

A common teaching check: hold the hum, then gently pinch the nose. If the sound stops, the ghunnah was genuinely nasal. If it carries on unchanged, you were humming somewhere else.

Two counts is a teaching norm rather than a stopwatch target. Timing is the part of tajweed that transfers worst on paper and best from ear to ear, so take your measure from a qualified teacher listening to you, not from a recording whose tempo you have guessed.

What are the most common mistakes with the ikhfa letters?

Almost every mistake learners make here is one of two things: the noon stays too clear, or the hum disappears. The rest are variations on those.

• A full noon (izhār by accident). The tongue tip hits the gum ridge and you hear a crisp n instead of a concealed noon.
• A missing ghunnah. The noon is skipped altogether, so the word sounds clipped and the two counts vanish.
• A full merger (idghām by accident). The next letter comes out doubled, which is a different rule and a different sound.
• Over-holding. The hum stretches to four or five counts and begins to sound like a separate elongation.
• Wrong place of resonance. The hum sits in the mouth and sounds buzzy rather than nasal.
• Forgetting word boundaries. Ikhfāʾ happens across two words far more often than inside one word, and that is exactly where learners stop applying it.
• Losing it at speed. The rule is applied carefully in slow practice and abandoned the moment the recitation moves faster.

Is ikhfa shafawi the same as the ikhfa letters?

No, and the two are worth separating early. The fifteen letters on this page govern the noon sākinah and the tanween; this rule is called ikhfāʾ ḥaqīqī, the true concealment. Ikhfāʾ shafawī is a separate rule for the letter mīm: when a mīm sākinah is followed by ب, the mīm is concealed with a light ghunnah and the lips stay gently together rather than closing hard.

The underlying idea is the same — a letter hidden behind a hum — but the letter concerned and the place of articulation are different. If the two get mixed up, the usual symptom is a heavy mīm in the wrong place, which a trained ear will catch immediately.

How can I practise the ikhfa letters on my own?

Short, frequent, out-loud sessions work far better than long silent reading. A workable routine:

1. Memorise the three rows. Say them in order, then out of order, until recall is instant. Recognising a letter in a fraction of a second is the practical goal.
2. Isolate one letter per session. Take a single ikhfa letter and repeat one short pair slowly, listening for the hum, perhaps ten times.
3. Record yourself. Two minutes of slow recitation, recorded and replayed, will expose a too-clear noon faster than anything else.
4. Mark a page. Take one page of the muṣḥaf and underline every noon sākinah and every tanween, writing the following letter alongside. This trains the eye to notice the rule before the tongue has to act.
5. Read the same page twice. Once at a careful pace, once slightly faster, keeping the concealment identical both times.

Expectations matter here. Ikhfāʾ rarely feels natural in the first few lessons; most learners begin to hear the difference fairly quickly but need weeks of short practice before the tongue produces it without prompting, and holding it at speed takes longer still. That is normal, not a sign of a weak ear.

Tajweed is an oral skill, and no page — this one included — can hear you. At Rattel Academy, certified male and female teachers, many holding ijāzah, teach one-to-one online to students worldwide, so an ikhfāʾ slip is corrected the moment it happens; a free level-assessment class is a sensible way to find out where to begin.