Qalqalah literally translates to 'echo' or 'reverberation'. Qalqalah refers to the echoing or shaking sound produced when certain letters are pronounced with Sukoon, which indicates no vowel sound.
Rule Color:
بِسۡمِ ٱللَّهِ
Rule Letters:
ْق ْط ْب ْج ْد
Sample words
For more detail about Qalaqah please visit:
https://bayanulquran-academy.com/qalqalah-in-tajweed/