N. glûdh n. “soap” (Category: Soap)
A noun appearing as {lhúð >>} glúð in The Etymologies of the 1930s glossed “soap” and derived from primitive ᴹ✶(g)libda under the root ᴹ√(G)LIB having to do with ointments (Ety/LIB²). Here the b vocalized to u and the resulting diphthong iu became ū as was usual in Noldorin of the 1930s.
Conceptual Development: In the Gnomish Lexicon of the 1910s Tolkien had G. puim “soap” (GL/64), clearly based on the early root ᴱ√POYO having to do with cleanliness (QL/75).
Neo-Quenya: In Tolkien’s later writing, iu became ȳ, so in Sindarin of the 1950s and 60s this word would have become *glŷdh. I prefer to retain 1930s glûdh, perhaps as an abnormal phonetic development.
References ✧ Ety/LIB²
Glosses
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Phonetic Developments
| ᴹ✶libda > glúð | [glibda] > [gliuda] > [glūda] > [glūða] > [glūð] | ✧ Ety/LIB² |