Lumbar name of a star (or planet), tentatively identified with Saturn (MR:435), evidently connected to lumbo, lumbulë(Silm)
lumbënoun "gloom, shadow" (LUM)
lumbonoun "cloud" (pl. lumbor in Markirya), also glossed “gloom; dark, shade” (PE17:72, 168). In early "Qenya", lumbo was glossed "dark lowering cloud" (LT1:259)
lúmë (1) noun "time" (LU, PE17:168) or "hour", locative lúmessë(VT43:34), pl. locative lúmissen “at the times” (VT49:47), allative lúmenna "upon the hour", elided lúmenn' in the greeting elen síla lúmenn' omentielvo "a star shines upon the hour of our meeting", because the next word begins with a similar vowel. The complete form lúmenna omentielvo is found in WJ:367 and Letters:425 (footnote). Cf. also the compounds lumenyárë and lúmequenta, q.v.; see also #sillumë.
lúmë (2) noun "darkness" (one wonders if Tolkien confused lúmë "time, hour" and lómë "night") (Markirya)
lumenyárënoun "history, chronological account" (NAR2 - read *lúmenyárë?) According to VT45:36, the manuscript spelling actually seems to be lumennyáre, but Hostetter and Wynne conclude that this is "probably a slip": The double nn would be difficult to justify.
lúmequentalë("q") noun "history" (LU, KWET). According to VT45:29, the accent marking the ú as a long vowel is actually missing in the entry LU in Tolkien's original Etymologies manuscript; yet it is apparently included both in the entry KWET and in the related words lúmequenta and lúmequentalëa; its omission in the entry LU is therefore probably just a slip.