01Four letters, four plain twins
Arabic has four emphatic consonants, and each has a plain partner made in the same spot: ص (ṣād) beside س (s), ض (ḍād) beside د (d), ط (ṭāʾ) beside ت (t), and ظ (ẓāʾ) beside ذ (the th of “this”). The tip of the tongue does the same thing for both letters of a pair. What changes is the rest of the tongue, and the result is a different consonant that Arabic uses to tell words apart.
Transliteration marks the four with a dot underneath: ṣ, ḍ, ṭ, ẓ. Arabic grammarians call them al-ḥurūf al-muṭbaqa, from iṭbāq, “covering”: the tongue rises to cover the roof of the mouth. This lesson is about formal Arabic and assumes you can read the letters and short vowels.
Starts with ص: the tongue is pulled back and the vowel after it sounds dark.
Starts with س: a plain s and a bright vowel.
02One movement: the tip stays, the back of the tongue rises
Say a long ssss. Now keep the tip of your tongue exactly where it is and pull the back of the tongue up and back, towards the soft palate and the throat, so that the middle of the tongue dips like a spoon. The hiss drops in pitch and sounds hollow. That is ص.
Two things should not change. Your lips need not move: rounding them adds a w colour, not emphasis. And the tip stays at the s position: if it slides back towards sh, you lose the s. Everything happens behind the tip.
The same movement turns each plain letter into its twin: د into ض, ت into ط, ذ into ظ. Practise it on the s first, because you can hold an s as long as you like and hear the change as it happens.
With ص: a long, dark ā, close to the a of “father”.
With س: the same word shape with a bright ā.
03Listen to the vowels
Emphasis is easiest to hear in the vowels around the consonant. After ص, ض, ط or ظ, a sounds like the a of “father”, never the a of “cat”, and i and u sound lower and duller. The darkness often spreads over the whole syllable, sometimes over the whole word.
That makes the vowel your first check. Record yourself saying صَيْفٌ and سَيْفٌ, then listen only to the vowel after the first letter. If both sound the same, the back of your tongue did not rise.
Grammarians list seven raised letters (ḥurūf al-istiʿlāʾ) that darken the vowels: the four emphatics plus ق, خ and غ. The emphatics darken them the most.
04ض and د
ض is today an emphatic d: the tip closes behind the upper teeth as for د, the back of the tongue rises, and the voice stays on. Make a د, hold the closure, add the movement you practised on ص, then release into a dark a.
Arabic is sometimes called the language of the ḍād (lughat al-ḍād). Medieval grammarians described ض as a sound made along the side of the tongue, and thought it existed in no other language. That old sound survives only in a few local varieties; the emphatic d is the standard pronunciation of formal Arabic today.
With ض: an emphatic d and a dark a.
With د: a plain d and a bright a.
With ض. In a sentence: ضَلَّ الطَّرِيقَ, he lost his way.
With د: دَلَّهُ عَلَى الطَّرِيقِ, he showed him the way. One letter separates losing the way from showing it.
05ط and ت
ط is an emphatic t: the tip closes behind the upper teeth as for ت, the back of the tongue rises, and the voice stays off.
There is a second cue you can feel. ت comes with a small puff of air, like English t; ط is released with almost none. Hold a hand in front of your mouth and compare.
With ط: no puff, and the ī sounds a little lower and duller.
With ت: a light puff and a clear ī, as in “teen”.
With ط: the darkness colours both a’s.
With ت: the same word shape with bright vowels.
06ظ and ذ
ذ is the th of English “this”: the tip of the tongue between the teeth, the voice on. ظ is the same sound with the back of the tongue raised, an emphatic th. Put the tip between your teeth, start the th of “this”, add the movement and listen for the dark vowel.
Many speakers, under the influence of spoken varieties, say ظ as an emphatic z, with the tip behind the teeth. In careful formal Arabic it is made between the teeth, and that is the sound to learn here.
With ظ: ظَلَّ يَنْتَظِرُ, he kept waiting.
With ذ: a plain th, as in “this”, and a bright a.
07ض is not ظ
Both are emphatic and both are voiced, so learners often swap them. The difference is how the air flows. ض is a stop: the tip closes behind the upper teeth, the air stops for an instant, then bursts out. ظ never closes: the tip rests between the teeth and the air rubs through, as for th.
So check whether the air stops. A mirror helps too: for ظ the tip of your tongue shows between your teeth; for ض it stays hidden.
With ض: a closure, then a release.
With ظ: no closure; the air keeps flowing between the teeth.
08Practise it with feedback
Kalima’s pronunciation drill (part of Kalima Pro) listens as you read a word aloud and judges each emphatic letter against its plain twin, ص against س, ض against د, ط against ت and ظ against ذ, letter by letter, with a tip when it hears a slip. It does not compare ض with ظ.