Ilk. final [mb], [mm] became [m]; [-m{bm}] > [-m]
In Ilkorin, it seems that final [-mb] and [-mm] reduced to [-m], the former probably developing as [-mb] > [-mm] > [-m]. The clearest example of this change is ᴹ✶turumbē > trumb > Ilk. trum (Ety/TURÚM). A similar changed occurred in Noldorin, but unlike Noldorin, this change did not occur medially in Ilkorin, as indicated by Ilk. umboth.
Phonetic Rule Elements
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Phonetic Rule Examples
| demb > dem | -mb > -m | ᴹ✶dimbā > Ilk. dem | ✧ Ety/DEM |
| dimb > dim | -mb > -m | ᴹ✶dimbē > Ilk. dim | ✧ Ety/DEM |
| dimb > dim | -mb > -m | ᴹ✶dembē > Ilk. dim | ✧ EtyAC/DEM |
| trúmb > trúm | -mb > -m | ᴹ✶turúmbē > trumb > Ilk. trum | ✧ Ety/TURÚM |
| timm > tim | -mm > -m | ᴹ✶tinmē > Ilk. tim | ✧ Ety/TIN |