ـْ
Sukun
No vowel at all — say the letter and stop there.
A small circle written above the letter.
- بْbBāʼ with Sukun
- تْtTāʼ with Sukun
- مْmMīm with Sukun
Unit 9 · Harakat — the vowel marks
Step 1 of 4 · Meet the mark
ـْ
Sukun
سُكُون
The sukun is the mark for silence after a letter. The letter is still said — it just gets no vowel, so it closes the syllable and you move straight on to the next letter.
In real words
بِنْت
bint · a girl
شَمْس
shams · a sun