A word for “dew” in the Gnomish Lexicon of the 1910s (GL/30), probably related to the early root ᴱ√RIŊI given its derivative ᴱQ. rin (ring-) “dew” (QL/80).
Gnomish
rin-
verb. to revolve, return, come back; to do again
-(i)ol
suffix. adjective suffix
-(r)in
suffix. adjective suffix
-la
suffix. noun suffix
-li
suffix. noun suffix
-od
suffix. noun suffix
-on
suffix. noun suffix
-r(i)ol
suffix. adjective suffix
-ra
suffix. adjective suffix
-st
suffix. noun suffix
-thi
suffix. noun suffix
-wed
suffix. adjective suffix
-wen
suffix. noun suffix
-weth
suffix. noun suffix
-wi
suffix. noun suffix
drim
noun. dew
est(i)rin
noun. pinnacle, tower
estirion
noun. pinnacle, tower
fann
noun. year
fanuin
masculine name. Year
gledhrin
adjective. slender
glen(d)rin
adjective. slender
An adjective for “slender” in the Gnomish Lexicon of the 1910s appearing as glen(d)rin or gledhrin, both elaborations of G. glenn “thin, fine” (GL/39).
lath
noun. year
tol erethrin
place name. Lonely Isle
-thol Reconstructed
suffix. adjective suffix
A verb appearing as G. rin- “(intr.) revolve, return, come back; do again” in the Gnomish Lexicon of the 1910s (GL/65), based on the early root ᴱ√RINI having to do with circles (QL/80).
Neo-Sindarin: The root ᴹ√RIN was still associated with circles in Tolkien’s later writings, so I would retain ᴺS. rin-, but only in the limited sense “to revolve” = “✱to circle round”. For “return” I would use the later verb dandol-.