Lesson : Dhammah or Pesh + Wa Sukun "U + U"
This lesson deals with the third long vowel which is the letter 'waw'. Recall that the 'waw' may have a vowel of its own; in this case, it is not a long vowel. Also, it may be empty of the three vowels but preceding it may be a fatha; in this case too, it is not a long vowel. The final situation is where the 'waow' is empty of the three vowels and preceding it is its appropriate vowel; the dhamma; this 'waw' is a long vowel.
This 'waw' is called the 'waow' maddah. In the following charts, the letters of the alphabet have been given a dhamma, and a 'waw' empty of vowels has been placed after each letter.
The letter 'baa' with a dhamma atop it, for example, sounds like 'bu'. But adding the 'waow' causes the word to sound like 'buu'.