The punctuation in The Etymologies is considered incorrect (the full dot after this word should conceivably be a comma)
Primitive elvish
kwel
root. revolve
kwer
root. revolve, revolve, [ᴱ√] turn
kwel
root. revolve
kwer
root. revolve, revolve, [ᴱ√] turn
thinna-
verb. to fade, to grow towards evening
The punctuation in The Etymologies is considered incorrect (the full dot after this word should conceivably be a comma)
sinta-
verb. fade
sinta- (þ) (2) vb. "fade", pa.t. sintanë (THIN)
vinda-
verb. fade
[vinda- vb. "fade"; pa.t. vindanë given (VT46:21). Compare vinta-.]
vinta-
verb. fade
[vinta- (2) vb. "fade", pa.t. vintë, vintanë given. (WIN/WIND) Compare vinda-.]
fir
fade
- fir- (i fîr, i firir) (die), 2) pel- (i bêl, i phelir) (wither), 3) thinna- (grow toward evening)
fir
fade
(i fîr, i firir) (die)
pel
fade
(i bêl, i phelir) (wither)
thinna
fade
(grow toward evening)
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!
wínda-
verb. fade
A root Tolkien used for “revolve” in notes from the late 1950s or early 1960s, along with variant √KWEL and derivatives Q. querend- “pivot, revolving centre” and Q. querma “spinning wheel, turn-table” (PE17/65). It replaced √PEL for this purpose, which came to mean “edge, bound, fence, limit”. This note seems to imply that √KWER primarily meant a horizontal rotation, but it was also the basis for Q. querna, as in silmë nuquerna “s-reversed” for an inverted silmë tengwa (LotR/1123), though it may be that the nu- here is necessary to imply a vertical rotation.
The earliest precursor to this root was ᴱ√KERE “turn” from the Qenya Lexicon of the 1910s, though this root’s derivatives mostly had to with earthenware and pottery (QL/46). In the Early Quenya Grammar of the 1920s Tolkien introduced several variants of this root: ku̯ere, ki̯ere and elaboration ᴱ√kereke “turn round and round, send to and fro”, the latter said to be the basis of words having to do with “weave” in a syncopated form √kreke (PE14/65). In this document, none of these variants had any derivatives, but it seems the first of these ku̯ere survived in Tolkien’s later conception of the languages.
Neo-Eldarin: For purposes of Neo-Eldarin, I would mostly use √KWER for “revolve, ✱turn”, and avoid the variant √KWEL which (a) has no derivatives and (b) conflicts with √KWEL “fade”. However, √KWEL is useful for preserving Noldorin words having to do with rotation from the earlier sense of the root ᴹ√PEL “revolve on fixed point” from the 1930s, so I would keep it as Sindarin-only variant to allow the retention of words like N. pelthaes “pivot”; this may also have been Tolkien’s motive for having such a variant of √KWER “revolve”.