A word for “dim” in the Gnomish Lexicon of the 1910s, an adjective form of G. morth “darkness” (GL/58).
Gnomish
auth
noun. sunshine, warmth; noontide
gothwen
noun. battle
mortha
adjective. dim
There are more words but they are from Tolkien's earlier conceptional periods. Tolkien likely changed these words as he evolved the aesthetics and completeness of the languages. You may even find languages that Tolkien later rejected. Do not mix words from different time periods unless you are familiar with the phonetic developments.
Below: Tolkien's Late Period (1950–1973). These are from Tolkien's late conceptual period — his most settled forms of the languages. Prefer these over the earlier ones above when composing new text.
A noun in the Gnomish Lexicon of the 1910s glossed “sunshine, warmth; noontide” (GL/20), likely a derivative of the early root ᴱ√AWA “burn; be parched, yellow, warm” (QL/33). It also appeared as unglossed {ôth >>} auth in the Gnomish Lexicon Slips modifying this document (PE13/111).