Etymograph > Tolkien's Languages > Sindarin > Rules > s-soft-mutation-phonemic

Source: https://eldamo.org/content/words/word-3345651089.html

{[-sonorant,-continuant,-voice]|b|d|g|m|s|h} > {[+voice]|v|ð|0|v|h|x}

Referencing rules

s-soft-mutation