A noun in the Gnomish Lexicon of the 1910s glossed “wood; a pole, beam or log” (GL/31), likely related to the early root ᴱ√TUŘU from the Qenya Lexicon as suggested by Christoper Tolkien (LT1A/Turuhalmë; QL/096), itself probably a blending of TUÐU and DURU.
Gnomish
log-
verb. to curl (intr.), bend (intr.), wind (twine round anything), twine
durufui
proper name. Yule, (lit.) Log-night
duru
noun. wood; pole, beam, log
duruchalm
proper name. Yule
halm na-dhuruthon
proper name. Yule
tund
noun. log for the fire
A verb glossed {“curl (tr.), braid hair, tie” >>} “curl (intr.), bend (intr.), wind (twine round anything), twine” in the Gnomish Lexicon of the 1910s (GL/54), clearly based on the early root ᴱ√LOKO “twine, twist, curl” (QL/55). Tolkien probably decided this verb was intransitive while introducing G. loctha- “curl (tr.), bend, wind, twine, tie knot, tangle” immediately below it.
Neo-Sindarin: I adapt G. loctha- as ᴺS. loetha- “to curl, bend, wind, twine” to better fit Sindarin phonology, and I would use it both transitively and intransitively, because I prefer to use ᴺS. log- to mean “haul, drag, pull, draw”.