| Letter | → | Result | Example |
|---|---|---|---|
| Voiceless Stops | |||
| C | → | G | cerin → sui gerin like a mound |
| P | → | B | perian → sui berian like a hobbit |
| T | → | D | talan → sui dalan like a tree-house |
| Voiced Stops | |||
| B | → | V | brith → sui vrith like gravel |
| D | → | DH | dîn → sui dhîn like silence |
| G | → | ' | glân → sui 'lân like a hem |
| Fricatives | |||
| H | → | CH | ham → sui cham like a chair |
| S | → | H | sigil → sui higil like a necklace |
| Nasal | |||
| M | → | V | mirian → sui virian like a silver coin |
| Voiceless Approximants | |||
| HW | → | CHW | hwand → sui chwand like a sponge |
| LH | → | THL | lhewig → sui thlewig like an ear |
| RH | → | THR | rhoss → sui thross like a whisper |
| Ancient Nasal-Stops | |||
| B | → | M | bauglir → sui mauglir like a tyrant |
| D | → | N | dîr → sui nîr like a man |
| G | → | Ñ | golovir → sui ñolovir like a Silmaril |
The way prepositions are used in Sindarin is straightforward. They go at the beginning of their phrase. A prepositional phrase can be used to modify verbs as though it was an adverb, or nouns as though it was an adjective.
The following prepositions cause vocalic mutation on the following word.
When prepositions are turned into prefixes they go directly onto the noun and they turn the noun into an adjective or adverb.
n'aduial at evening twilight
na Velegaer at Belegaer
sui 'wilwileth like a buterfly
di-dund underhill