A word for “cobweb” in the Gnomish Lexicon of the 1910s (GL/46). Its initial element seems to be G. gwidh- “weave”, and its final element might be a variant of G. gung “spider” (though this word was deleted).
Gnomish
gwidh-
verb. to weave (tr.)
gwidh-a-ging
noun. cobweb
The Gnomish Lexicon of the 1910s had the verb G. gwidh- “weave (tr.)” based the early root ᴱ√gu̯iđ (GL/46).
Neo-Sindarin: I’d update this verb to ᴺS. gwir- “to weave” based on the later weaving root √WIR (PE17/191; VT39/10). Fiona Jallings previously suggested ᴺS. gwer- “to weave, wind, spin, twist” based on √WER “weave” (PE17/33) and inspired by G. gwer- “weave, wind” (PE15/27), but √WER is from around 1957 and is not compatible with Q. Vairë “Weaver”, so I prefer the 1959-60 form of the root: √WIR.