An adjective for “silent” in the Gnomish Lexicon of the 1910s related to mug- “keep silent” (GL/57-58).
Gnomish
tî
noun/adjective. straight; line
tîl
noun. cicatrice, scab, healing of a wound
tîr
noun/adjective. †straight, upright, honest (aj.); esteem, regard, honour
tîf
noun. resentment, ill feeling, bitterness
tîr
noun. king
maug
adjective. silent
tertha-
verb. to devour, destroy
A verb appearing as G. tertha- or tercha- “devour, destroy” in the Gnomish Lexicon, perhaps related to G. terch “worm” [= “✱worm eaten”] (GL/70) and thus ultimately derived from the early root ᴱ√TEŘE “pierce, boring” (PME/91).
Neo-Sindarin: Since √TER “pierce” survives in Tolkien’s later writings, I would retain ᴺS. tertha- “destroy” for purposes of Neo-Sindarin, originally with the sense “✱fill with holes”, but for “devour” I would use ᴺS. ammad-.
tûr
noun. king
tûr na·daurion
masculine name. Tûr na·Daurion
i
article. the
ontha
pronoun. his
sint
noun. spark
teltha-
verb. cover in
tercha-
verb. to devour, destroy
A noun appearing as G. tîl “cicatrice, scab, healing of a wound” in the Gnomish Lexicon of the 1910s derived from the early root ᴱ√TELE “cover in” (GL/70), hence probably referring to the scab as the covering of a wound. Likely the primitive form was ✱tēl- since ancient ē became ī in Gnomish.
Neo-Sindarin: The root √TEL-U was still associated with roofs and coverings in Tolkien’s later writings, and the sound change ē > ī also remained a feature of Sindarin, so I’d retain this word as ᴺS. tîl “scab, cicatrice, healing of a wound” for purposes of Neo-Sindarin, perhaps from primitive ✱tēlŭ.