If:
Then
Example:
| مِوْعَادٌ | → | مِيْعَادٌ |
If
Then
Example:
| مُيْسِرٍ | → | مُوْسِرٍ |
If
Then
Example:
| قُاتِلَ | → | قُوْتِلَ |
If
Then
Example:
| مَحَارِابُ | → | مَحَارِيْبُ |
Morphological rule: a ي in the lām position after a ḍammah converts to a و.
When a wāw stands as the lām kalimah after a kasrah, it converts to a yāʾ, yielding forms like duʿiya and dāʿiyah.
When wāw falls on the fourth letter or later and is not preceded by a ḍammah or wāw sākin, it is converted to yāʾ.
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.
