If:
Then:
Example:
| كَوْنُوْنَةٌ | → | كَيْنُوْنَةٌ |
When a plural on the scale of فُعْلٌ or فُعْلى has yāʾ as its ʿayn kalimah, the preceding letter takes a kasrah.
On the scale of fuʿlā with a wāw lām, the wāw turns to yāʾ; on faʿlā with a yāʾ lām, the yāʾ turns to wāw.
When the fāʾ of iftiʿāl is an original wāw or yāʾ, change it to tāʾ and assimilate with the tāʾ of iftiʿāl.
When two wāws meet at the end of the scale فُعُوْلٌ, both become a yāʾ with shaddah and the preceding ḍammah turns to a kasrah.
