 He referred to "dwarves" as "a piece of private bad grammar".In Appendix F of "The Lord of the Rings" it is explained that if we still spoke of "dwarves" regularly, English might have retained a special plural for the word "dwarf" as with "goose"—"geese".Despite Tolkien's fondness for it, the form "dwarrow" only appears in his writing as "Dwarrowdelf", a name for Moria.