√TUP root. “cover over, hide”
This root had to do with covering things for much of Tolkien’s life. The first appearance of the root was unglossed ᴱ√TUPU in the Qenya Lexicon of the 1910s with derivatives like ᴱQ. tumpo “shed, barn” and ᴱQ. tupu- “roof, put lid on, put hat on, cover” (QL/95). Tolkien said this root was “much as TELE”, which in this document was glossed “cover in” (QL/90). The root ᴱ√TUPU also had derivatives in the contemporaneous Gnomish Lexicon such as G. tub- “cover” and G. tump “a shed” (GL/71).
In The Etymologies of the 1930s the root ᴹ√TUP was given as a variant of ᴹ√TOP “cover, roof” with derivatives like ᴹQ. tupse/N. taus “thatch” (Ety/TUP; EtyAC/TOP). In Tolkien’s later writings its most notable derivative was Q. untup- “cover (over)” as in Q. ar hísië untúpa Calaciryo míri oialë “and mist covers the jewels of Calacirya forever” (PE17/73; LotR/377). The root √TUP “cover over” itself was mentioned a couple times in Tolkien’s later writings (PE17/73), though in one place of these places it was given as √TUI “cover over, hide”, but since in that note it was the basis for primitive ✶Utupnu, this √TUI is clearly a malformed *√TUP (MR/69).
References ✧ MR/69; PE17/73, 188
ᴹ√TUP root. “*cover”
References ✧ Ety/TUP; EtyAC/TOP
ᴱ√TUPU root. “*cover”
Reference ✧ QL/95