If:
Then:
Example:
| نَهُيَ | → | نَهُوَ |
When a wāw stands as the lām kalimah after a kasrah, it converts to a yāʾ, yielding forms like duʿiya and dāʿiyah.
When wāw or yāʾ falls at the end of a word after an alif zāʾidah, it is converted to a hamzah.
When a و or ي follows a ḍammah in the lām of an ism, the ḍammah shifts to a kasrah and the weak letter is dropped after the two sākins meet.
When wāw falls on the fourth letter or later and is not preceded by a ḍammah or wāw sākin, it is converted to yāʾ.
