This type of mutation is used for prepositions and prefixes ending in D.
| Letter | → | Result | Example |
|---|---|---|---|
| Voiceless Stops | |||
| ED+C | → | E CH | cerin → o cherin from a mound |
| ED+P | → | E PH | perian → o pherian from a hobbit |
| ED+T | → | E TH | talan → o thalan from a tree-house |
| Voiced Stops | |||
| ED+B | → | E B | bâd → o bâd from a path |
| ED+D | → | E D | dath → o dath from an abyss |
| ED+G | → | E G | galadh → o galadh from a tree |
| Fricatives | |||
| ED+F | → | EPH F | falas → oph falas from a shore |
| ED+H | → | E CH | ham → o cham from a chair |
| ED+S | → | ES S | sigil → os sigil from a necklace |
| ED+TH | → | ETH TH | tham → oth tham from a hall |
| Nasal | |||
| ED+M | → | E M | mirian → o mirian from a silver coin |
| ED+M | → | E N | ninglor → o ninglor from a golden water-lily |
| Voiceless Approximants | |||
| ED+HW | → | ETH W | hwand → oth wand from a sponge |
| ED+LH | → | E THL | lhaw → o thlaw from a pair of ears |
| ED+RH | → | E THR | rhoss → o thross from a whisper |
| Ancient Nasal-Stops | |||
| ED+B | → | E MB | bauglir → o mbauglir from a tyrant |
| ED+D | → | E ND | dîr → o ndîr from a man |
| ED+G | → | E ÑG | golovir → o ñgolovir from a Silmaril |