taura adj. "mighty, masterful" (TUR, PE17:115), "very mighty, vast, of unmeasured might or size" (VT39:10). Cf. túrëa.
Quenya
taura
adjective. (very) mighty, masterful; vast, of unmeasured might or size
taura
mighty, masterful
túra
big, great
túra adj. "big, great" (PE17:115), related to words for power and apparently referring to a more abstract greatness than words like haura "huge". Cf. taura, túrëa. Apparently initial element of Túrosto.
arauco
powerful, hostile, and terrible creature; demon
arauco ("k")noun "a powerful, hostile, and terrible creature; demon" (variant of rauco). Tolkien's earlier "Qenya" has araucë "demon" (WJ:415, LT1:250)
melehta
mighty
melehta adj. "mighty" (PE17:115), cf. meletya
melehta
adjective. mighty
An adjective for “mighty” derived from the root √MBELEK in a page of notes having to do with “large & small” words, probably from the late 1960s (PE17/115), apparently from the primitive form ✱✶mbelektā (with [kt] > [ht]). A variant form meletya appears with the 2nd-plural possessive suffix -lda as Meletyalda “your mighty” in the Quendi and Eldar essay of 1959-60 (WJ/369), likely from the primitive form ✱✶mbelekya (with [kj] > [tj]). This variant form has a more typical primitive adjective suffix ✶-ya, but is inconsistent with the attested Sindarin cognate S. belaith, so I’d stick with melehta for purposes of Neo-Quenya.
meletya
mighty
#meletya adj. "mighty", isolated from meletyalda adjective with suffix "your mighty" = "your majesty" (see -lda; meletya = *"mighty"). In full Aran Meletyalda "king your mighty" = "your majesty" (WJ:369). Compare melehta.
meletya
adjective. mighty
polda
big
polda adj. "big" (PE17:115), "strong, burly" (POL/POLOD)
polda
adjective. big, big; [ᴹQ.] strong, burly; [ᴱQ.] mighty, powerful
An adjective for “big” derived from √pol “large, big (strong)” in a page of notes having to do with “large & small” roots, probably from the late 1960s (PE17/115). Another note from the same period had deleted forms polda, polya, also meaning “big” (PE17/115). The Etymologies of the 1930s had ᴹQ. polda “strong, burly” derived from the root ᴹ√POL(OD) “physically strong” (Ety/POL). Early Qenya word-lists of the 1920s had ᴱQ. polda “mighty, powerful” along side ᴱQ. poldórea “powerful” (PE16/137), while the Qenya Lexicon of the 1910s had ᴱQ. poldorea “muscular” under the early root ᴱ√POLO “have strength” (QL/75).
Neo-Quenya: For most of Tolkien’s life, the root √POL was connected to physical ability and strength, so for purposes of Neo-Quenya I would assume polda means someone that is both “big and strong” simultaneously, with “burly” being a single English word that approximates its meaning.
rauco
powerful, hostile, and terrible creature
rauco ("k") noun "a powerful, hostile, and terrible creature", "very terrible creature", especially in the compound Valarauco noun "Demon of Might" _(WJ:415, VT39:10, cf. SA:raukor. In the Etymologies, stem RUK, the gloss is "demon".)_ Longer variant arauco. The plural form Valaraucar "Balrogs" seems to contain the variant rauca.
A word in a list of “large & small” roots from the late 1960s glossed “mighty, masterful” along with an equivalent word túrëa, both derived from √TUR “strong, mighty, in power” (PE17/115). In notes associated with the Quendi and Eldar essay of 1959-60, Tolkien glossed it as “very mighty, vast, of unmeasured might or size” as an example of ancient a-fortification of the root √TUR (VT39/10). ᴹQ. taura “mighty” appeared in The Etymologies of the 1930s derived from primitive ᴹ✶taurā under the root ᴹ√TUR “power, control, mastery, victory” (Ety/TUR).
Neo-Quenya: For purposes of Neo-Quenya, I would assume this word applies to general might and majesty, applicable to people but also to inanimate things, as in i taura ëaron “the mighty ocean = the vast and powerful ocean”. I would use túrëa more specifically for someone who is politically powerful, having mastery or influence over others.