Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!
past
noun. skin
dim
adjective. past, over, former
dimborn
noun. the past, past days, olden times
en
pronoun. that by you, that already mentioned (by you), that past
gî(laith)
adverb. once, in past
luin
adverb/adjective. gone, past; ago
cwast
adjective. shaking
The noun G. cwast “shaking” appeared in the Gnomish Lexicon of the 1910s (GL/28), clearly based on the early root ᴱ√QASA and cognate to ᴱQ. qasa- “shake, flap, nod, rustle” (QL/76).
Neo-Sindarin: Since I retain ᴺQ. quas- “shake” for purposes of Neo-Quenya, I would retain this word for Neo-Sindarin as well, but adapted as ᴺS. past “shaking” with the usual Sindarin sound change of ancient kw to p.
-(i)ol
suffix. adjective suffix
-(r)in
suffix. adjective suffix
-r(i)ol
suffix. adjective suffix
-ra
suffix. adjective suffix
-wed
suffix. adjective suffix
a
preposition. from
o
preposition. from
-thol Reconstructed
suffix. adjective suffix
A word for “skin” appearing in the Gnomish Lexicon of the 1910s under G. path “peel, skin, bark” with pl. padhin (GL/63), hence probably related to ᴱQ. parma “skin, bark; parchment; book” from the contemporaneous Qenya Lexicon under the early root ᴱ√PARA [✱PAÐA] (QL/72).