Name of the Valar whose rebellion brought evil into the world (S/16), more commonly known as Morgoth. His name is an ancient compound of the root ✶(m)belek- “mighty” and ✶ōre “rising”, so meaning: “Mighty Arising” (MR/350, PE17/115), translated more loosely as “He who arises in Might” (WJ/402, PM/358). This name also appeared in the longer form Melkórë (MR/350, PE17/115). This is one of the names Tolkien generally spelled with a “k” (like Kementári and Tulkas) despite normally representing the [k]-sound with “c” in Elvish, though in a few places he did write Melcor (MR/362, VT49/24).
Possible Etymology: In the name Melkorohíni “Children of Melkor” (MR/416), the stem form for Melkor seems to be Melkoro-. This is consistent with the primitive form ✶Mbelekōro appearing in the Quendi and Eldar essay from 1959-60 (WJ/402). Elsewhere its primitive form was given as ✶Mbelekōre (PE17/115) and its ablative form appears in notes from the mid-1960s as Melkorello (VT49/6-7), indicating a stem-form of Melkore-, consistent with the long form Melkórë noted above.
Conceptual Development: This name first appeared in the earliest Lost Tales as ᴱQ. Melko without its final -r (LT1/47). This name appeared in the Qenya Lexicon glossed “God of Evil” but without an etymology (QL/60). In the contemporaneous Gnomish Lexicon, it was connected to the root ᴱ√melek/mbelek/belek, along with ᴱQ. velka “flame” (GL/22). It is likely that Tolkien first considered this name as representative of his “fiery” evil, as his contemporaneous (but later abandoned) name ᴱQ. Yelur was that of “wintery” evil.
In some texts from the 1920s, ᴱQ. Melko was given as the derivative of (unglossed) ᴱ✶Mailiko (PE13/149; PE14/69), and the name ᴹQ. Melko appeared in The Etymologies from the 1930s as a derivative of ᴹ✶Mailikō < ᴹ√MIL(IK) “greed, lust” (Ety/MIL-IK). The form Melkor (with an -r) appeared towards the end of Silmarillion drafts from the 1930s (LR/332). This was the form used thereafter, starting with Silmarillion revisions from the 1950s-60s (MR/7, MR/22 note #5).
The most notable uses of this root were as the basis for the name Q. Melkor and (sometimes) the adjective S. beleg “great”. This root first appeared as ᴱ√mbelek, belek or melek in the Gnomish Lexicon of the 1910s, with Gnomish name G. Belcha vs. Qenya name ᴱQ. Melko; its other derivatives indicate the meaning of the root was “✱flame” (GL/20). The Qenya noun ᴱQ. velka “flame” indicates that unstrengthened ᴱ√belek was used along with strengthened ᴱ√mbelek, but there are no obvious derivatives of ᴱ√melek in this period.
There is no evidence of this root in The Etymologies of the 1930s; in this period ᴹQ. Melko was derived from ᴹ√MIL(IK) “✱greed, lust” (Ety/MIL-IK). The root appears a number of times in Tolkien’s later writings, always as the basis for Q. Melkor. The root melk- was mention in notes associated with the essay Athrabeth Finrod ah Andreth from around 1959, where Tolkien said it “means ‘power’ as force and strength” (MR/350). The root appears as √MELEK “great, mighty, powerful, strong” (rejected) or mbelek “large, great” in notes from the late 1950s or early 1960s, connected to both S. beleg and Q. Melkor (PE17/115). The root √MBELEK is implied by Tolkien’s etymology of Q. Melkor in the Quendi and Eldar essay from 1959-60, being derived from ✶Mbelekōre “He who arises in Might” (WJ/402).
It seems Tolkien vacillated on whether Q. Melkor and S. beleg were related. The root may have been √MELEK, unrelated to √BEL. Alternately, it may have been √MBELEK, but the various mutations of S. beleg “great” show no signs of primitive initial mb-. Thus, it seems the strengthening to mb- either occurred only in Quenya, or it enhanced the meaning of the root from “large, great” to “powerful, mighty”.
Neo-Eldarin: For purposes of Neo-Eldarin, I prefer the last of these theories.