| Medieval form | Modern form | 
| pendevic | pendefig | 
| idaw | iddo | 
| dyvot | dyfod | 
| kyvoeth | cyfoeth | 
| hyt | hyd | 
| ieuengtit | ieuenctid | 
| dyd | dydd | 
| kyvodi | cyfodi | 
| coet | coed | 
| kerdet | cerdded | 
| oedynt | oeddynt | 
| guastat | gwastad | 
| llathreit | llathraid | 
| lladyssei | lladdyssei | 
| mynwgyl | mwnwgyl | 
| gwisc | gwisg | 
| dywedut | dyweddud | 
| wyt | wyt, or gwyd | 
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