Sīn
سِين
Shapes in a word
س
alone
سـ
start
ـسـ
middle
ـس
end

A light, whistling “s”.

In the Quran
Whispered · الهَمْسSoft (flowing) · الرَّخَاوَةLowered (light) · الاسْتِفَالOpen · الانْفِتَاحRestrained · الإِصْمَاتWhistling · الصَّفِير
13

Tip of the tongue near the lower front teeth

The tip rests near the lower front teeth, leaving a very narrow channel so the air whistles.

Rest the tip of the tongue near the lower front teeth, leaving a narrow channel, and blow.

More words with س
سَWith fatha
سِWith kasra
سُWith damma
سْWith sukun
Characteristics (ṣifāt)
WhisperedالهَمْسBreath keeps flowing with the letter, so it sounds airy.
Soft (flowing)الرَّخَاوَةThe sound flows on while the letter is held.
Lowered (light)الاسْتِفَالThe tongue stays low, so the letter sounds light.
OpenالانْفِتَاحThe tongue stays apart from the palate.
RestrainedالإِصْمَاتMade further in, so it takes more care to say.
WhistlingالصَّفِيرThe air whistles through a narrow channel at the tip of the tongue.