@@@ form does not appear elsewhere and similar forms are not relevant
Gnomish
thar-
verb. to saw (up)
beb
adverb. [unglossed]
brid-
verb. [unglossed]
clidhron
noun. [unglossed]
climbol
noun. [unglossed]
dôn
?. [unglossed]
fî
noun. [unglossed]
gatha
?. [unglossed]
pad
noun. [unglossed]
praust
noun. [unglossed]
prog
noun. [unglossed]
rab-
verb. [unglossed]
rô
noun. [unglossed]
sind
noun. [unglossed]
sinthi
pronoun. [unglossed]
thail
noun. [unglossed]
thel
noun. [unglossed]
thelg
noun. [unglossed]
thil
noun. [unglossed]
thion
noun. [unglossed]
thrim
?. [unglossed]
thug
noun. [unglossed]
thû-
verb. [unglossed]
trum
?. [unglossed]
tûn
noun. [unglossed]
ulthanc
noun. [unglossed]
umeg
?. [unglossed]
’ôs
noun. [unglossed]
A verb appearing as G. thar- “saw (up)” in the Gnomish Lexicon of the 1910s (GL/72), likely based on the early ᴱ√SARA “saw” (QL/82). The Gnomish word indicates an actual root form of ✱ᴱ√ÞARA.
Neo-Sindarin: The root √THAR means “across” in Tolkien’s later writings, but I think ᴺS. thar- “to saw (up)” is still salvageable from an original sense of “✱(cut) across”.