Túrosto

gabilgathol

Túrosto place-name "Gabilgathol", a dwelling of the Dwarves (Sindarin Belegost; the names mean "Mickleburg", "Great Fortress"). Apparently túra + osto.

túrosto

place name. Mickleburg, (lit.) Great Fortress

Quenya name of Belegost (WJ/389). Its first element is a derivative of the root √TUR “strong” and the second element is osto “fortress”.

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.

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.