Tanween Damm (تَنْوِين الضَّمّ) in Arabic
Doubled damma — adds an "-un" sound to the end of an indefinite noun.
Last updated: May 2026
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Tanween Damm — tanwīn aḍ-ḍamm
"-un" — a short "u" followed by an "n" sound.
- Position
- above
- Family
- tanween
- Unicode
- U+064C
- Keyboard
- Shift + T
What does Tanween Damm mean?
Tanween damm is the nominative counterpart of tanween fath and tanween kasr. Visually it looks like a damma with a small hook (or two stacked dammas, depending on the font) above the final letter, producing an "-un" sound.
Tanween damm appears at the end of indefinite singular nouns in the nominative case — typically the subject of a sentence (كِتَابٌ "a book", as a subject). Like tanween fath and tanween kasr, it disappears when the noun is made definite with ال.
How to type Tanween Damm on Arabic keyboard
Shortcut on Arabic 101: Shift + T
Typing order: type the base letter first, then hold Shift and press the diacritic key. Most Arabic input requires this letter-then-diacritic sequence — typing the diacritic first will produce nothing or a disconnected mark.
Example: to type بٌ, press the base letter key, then Shift + T.
Example words with Tanween Damm
Practice typing Tanween Damm
Knowing the shortcut is one thing — building the muscle memory is another. Our diacritics drills weave fatha, kasra, damma, shadda, sukun, and the tanween marks into real words and full sentences.
Frequently asked questions
❓ Frequently Asked Questions
How do I type tanween damm on the Arabic keyboard?
On the Arabic 101 keyboard layout, hold Shift and press T. Type the base letter first, then Shift+T to add tanween damm — for example, ب, then Shift+T produces بٌ.
How do I tell tanween damm apart from a regular damma?
A regular damma is a single small waw shape above the letter. Tanween damm is a damma with an extra hook or a second damma stacked alongside it, depending on the font. In meaning: damma is just a short "u" sound; tanween damm adds an "-n" after the "u" (producing "-un").
Why are there three different tanween marks?
The three tanween marks (fath, kasr, damm) correspond to the three Arabic grammatical cases: accusative (-an), genitive (-in), and nominative (-un). They allow indefinite singular nouns to be marked for case in writing without adding a separate letter — the case is encoded in the diacritic itself.
Related diacritics
Or see the full Arabic diacritics guide.