lumna- stative vb. "be heavy" (LR:47, SD:310; cf. lumna- "to lie heavy" in the Etymologies, stem DUB-). A form lúvë was mentioned in connection with this verb, possibly a strong past tense form directly derived from the root DUB- (primitive *dūbē), but Tolkien struck it out (VT45:11).
lúnadj.??? a word of obscure meaning, perhaps "deep" as used of water (VT48:28)
lúnaadj. *“dark” in Lúnaturco and Taras Lúna, Quenya names of Barad-dûr (Dark Tower). (PE17:22). In the Etymologies, lúnë “blue” was changed by Tolkien from lúna(VT45:29).
[lúna] (2), see lúnë
luncanoun "wain" (VT43:19), “heavy transport wain” (PE17:28). #Ondolunca”stone-wain”, see under ondo.
lúnë (stem *lúni-, given the primitive form ¤lugni) adj. "blue" (LUG2, LT1:262; later sources rather give luinë, with pl. form luini in Namárië). According to VT45:29, lúnë in the Etymologies was changed by Tolkien from lúna.
lúnelinquë ("q") adj. *"blue-wet" (?), translated "surging" (MC:213, 220; this is "Qenya")
lungaadj. "heavy" (LUG1). Curiously, the variant lungu- appears in certain compounds; see Lungumá, lungumaitë.