Gnomish
gwaidhi
noun. a rime (i.e. the 2 actual rhyming words)
gwidh-
verb. to weave (tr.)
Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!
The Gnomish Lexicon of the 1910s had the verb G. gwidh- “weave (tr.)” based on 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.