Arabic Vowels and Diacritics: Reading What's Written — and What Isn't

The three short-vowel marks

Three diacritic marks supply the short vowels a, i, u. They sit above or below the letter they follow.

Examples here are fully vowelled for teaching — everyday text won't be.

Long vowels are letters, not marks: ا = ā, ي = ī, و = ū. So بَاب = fatḥa on ب then long alif = bāb. This is why the alphabet and the vowel system interlock — yāʾ and wāw do double duty as consonants (y, w) and as long vowels (ī, ū).

Sukūn (no vowel) and shadda (doubling)

Two more marks complete the toolkit. Sukūn ◌ْ means 'no vowel here' — it marks a consonant at the end of a syllable. Shadda ◌ّ means the consonant is doubled — بّ = bb. Doubling changes meaning, so shadda is the one mark everyday writers do keep when confusion would result.

Tanwīn — the -n endings you'll see but rarely say

Tanwīn doubles a vowel mark and adds an -n sound: ً an, ٍ in, ٌ un. In formal grammar these mark indefiniteness and case. In normal MSA reading, writers and speakers pause them off — you'll usually say them only at a formal podium. Learn to recognize them, but don't force them into your own speech.

ًan is the only one that survives in everyday speech — mainly in fixed adverbs like أهلًا ahlan 'welcome' and شكرًا shukran.

Reading without the marks

Street signs, menus, books, and messages are unvowelled: كتب could be katab 'wrote', kutub 'books', or kattaba 'made him write' — context decides. Fully vowelled text appears in the Qur'an, children's books, and learners' materials like the tables above.

One reading rule that trips everyone: sun and moon letters

The definite article ال al- is written identically on every noun — but it isn't always pronounced 'al'. Before sun letters (ت ث د ذ ر ز س ش ص ض ط ظ ل ن), the l of al- merges into the next letter and doubles it: الشمس = ash-shams, not 'al-shams'. Before the other letters (moon letters) it stays: القمر = al-qamar.

Transliteration in this course writes what is actually pronounced (ash-, an-, ar-…), never the unpronounced 'al'. One convention throughout: the clitic و wa- is hyphenated (wa-ʿalaykum), and transliterations show natural pause form — the verbs-time conjugation table is the labelled exception with full citation forms.

Mini practice