Chief settlement of Angmar (LotR/146). The language and meaning of this name is unclear, but it is often suggested this it is Sindarin, a combination of carn “red” and a lenited form of tûm “valley” (as suggested by David Salo, GS/371). The name may be debased Elvish, like the name of its kingdom Angmar, since the normal Sindarin words would be caran and tum. The name also resembles an early (rejected) name N. Caron-dûn or Carndoom “Red Valley” found in Lord of the Rings drafts from the 1940s, and could be a re-emergence of that name (RS/419, 433).
Sindarin
carn
noun. deed
carn dûm
place name. ?Red Valley
carth
noun. deed
Sindarin noun for a “deed”, attested only in its lenited plural form gerth within the word úgarth “trespass” (VT44/28), which probably more literally means “✱misdeed”. This word is not completely compatible with its Quenya cognate Q. carda “deed” from primitive ✶kardā, which in Sindarin should produce ✱cardh. Perhaps the Sindarin word had a slightly different primitive form ✱✶kartā. The expect form cardh might appear as an element in the variant form athragarð of S. athragared “interaction”.
Conceptual Development: Perhaps the earliest precursors of this word are G. cara “deed, act” and G. carm “act, deed, exploit” in the Gnomish Lexicon from the 1910s (GL/25; PE13/111), the latter a cognate of contemporaneous ᴱQ. karma “shape, fashion; act, deed” (QL/45). Early Noldorin word lists from the 1920s had ᴱN. carbh “deed” (PE13/140), reflecting Tolkien’s changing conception of the phonetic development of final -m in Noldorin. In The Etymologies from the 1930s, the word appeared as N. carth or carð “deed” (cardh), but these forms were rejected and replaced by N. car(ð) “building” when Tolkien decided the root meant only “make, build” and not “do” (Ety/KAR), a decision he later reversed.
cardh
deed
cardh (i gardh, o chardh), pl. cerdh (i cherdh). Note: cardh may also mean "house, building".
cardh
deed
(i gardh, o chardh), pl. cerdh (i cherdh). Note: cardh may also mean "house, building".
coll
scarlet
coll (red), lenited goll, pl. cyll (VT45:15, 24). Note: homophones mean "hollow" and also "cloak".
coll
scarlet
(red), lenited goll, pl. cyll (VT45:15, 24). Note: homophones mean "hollow" and also "cloak".
úgarth
ill deed
(sin), pl. úgerth (VT44:23)
A Sindarin noun for a “deed”, attested only in its lenited form garn within the word othgarn “misdeed” (PE17/151). The alternate form carth “deed” is perhaps better attested.