Liquid mutation in Sindarin
This mutation is the sketchiest in terms of what we know of it. Tolkien never mentioned it in any of his writings, but the texts we have seem to demand the existence of this mutation. Especially if Tolkien adheres to his own rules, which he did sometimes.
True to its name, liquid mutation occurs after words ending in a liquid:
or (=over, above, on), preposition
or- (=over), prefix
The mutations:













