(literally "long climb"), pl. endraith.
Sindarin
tag-
verb. to fix, to fix, *fasten, [G.] make firm, construct
Ara-
prefix. high, noble, royal
ar-
prefix. high, noble, royal
andrath
high pass
brand
tall
(lofty, noble, fine), lenited vrand, pl. braind.
duinen
high tide
(i dhuinen), pl. duinin (i nuinin). (VT48:26).
gondrath
highway
(i ’ondrath) (street of stone, causeway), pl. gendraith (i ngendraith = i ñendraith). Archaic pl. göndreith. (WJ:340). Possibly the pl. can also be gondraith, without umlaut of the first element.
hall
tall
(exalted); lenited chall; pl. hail. Note: a homophone means ”veiled, hidden, shadowed, shady”.
or
high
(adjectival pref.) or- (above, over), also ar- (noble, royal). In the form ar(a)- this is an element in the names of the kings of Arnor and Arthedain. Nouns:
or
high
(above, over), also ar- (noble, royal). In the form ar(a)- this is an element in the names of the kings of Arnor and Arthedain. Nouns:
raud
tall
(eminent, noble), in compounds -rod, pl. roed. Also used as noun ”champion, eminent man, [a] noble”.
taur
tall
(also tor-, tar- in compounds) (lofty, high, sublime, noble; vast, masterful, mighty, overwhelming, huge, awful), lenited daur, pl. toer. Note: homophones mean ”king (of a people)” and also ”great wood, forest”.
telu
high roof
(i delu, o thelu) (dome), pl. tely (i thely).
This verb appeared in some rough notes from around 1969 in various past forms such tanc “fixed”, tancher/tanker “they fixed” and tanchen “I fix” (PE23/138 note #12). See the discussion of the Sindarin past tense for more detail on these past forms. The verb ✱tag- is clearly based on the root √TAK “fix, fasten”.
Conceptual Development: The verb G. tag- “fix, make firm, construct” appeared in the Gnomish Lexicon of the 1910s (GL/68), likely based on the early root ᴱ√TAKA “fix, fasten” (QL/88).
Neo-Sindarin: For purposes of Neo-Sindarin, I would use tag- only in the later sense of its root: “to fix, ✱fasten”. For “make firm” I would use [N.] tangad(a)- and for “construct” I would use [ᴱN.] adaba- “build”.