Heavy and light letters (tafkhim and tarqiq) give the Quran its rich sound. Children hear the difference quickly once it is pointed out.
The seven heavy letters
خ ص ض غ ط ق ظ
Remember them with the phrase خُصَّ ضَغْطٍ قِظْ (khuss daghtin qidh).
How a heavy letter feels
- The back of the tongue lifts up towards the roof of the mouth.
- The mouth feels “full”, like holding a small ball inside it.
- The vowel after it sounds deeper: صَا sounds like “saw”, not “sa” as in “sat”.
Heavy and light pairs
| Light | Heavy |
|---|---|
| س (sin) | ص (sad) |
| ت (ta) | ط (ta) |
| ذ (dhal) | ظ (dha) |
| د (dal) | ض (dad) |
| ك (kaf) | ق (qaf) |
Saying each pair aloud is the fastest way for your child to feel the difference.
Letters that change
- ر (ra): usually heavy with a fatha or damma, light with a kasra.
- ل in “Allah”: heavy after a fatha or damma (قَالَ اللّٰهُ), light after a kasra (بِسْمِ اللّٰهِ).
The most common mistake
Making light letters heavy, especially س and ت next to a heavy letter. Ask your child to keep light letters “thin and smiley”.
Teacher’s tip: show a fist for heavy letters and a flat hand for light ones while reading. Children enjoy it, and the teacher can see at a glance if they know the rule.
Related: The difference between ق and ك.
