A root mentioned in The Shibboleth of Fëanor from the late 1960s serving as the basis for Q. olba of the same meaning (PM/341). Q. olvar “growing things with roots in the earth” from The Silmarillion was probably related (S/45, 345). In The Etymologies of the 1930s, “branch” words were derived from unglossed ᴹ√GOLOB: ᴹQ. olwa and N. golf “branch” (Ety/GÓLOB).
Neo-Eldarin: For purposes of Neo-Eldarin, I would assume √GOLOB is a Sindarin-only variant of √OLOB, perhaps influenced by √GAL “grow”. This would allow us to retain golf = “branch”, though the one name where it appeared, N. Gurtholf “Wand of Death” (Ety/ÑGUR; LR/147), became S. Gurthang “Iron of Death” in later versions of The Silmarillion (S/210).
The roots √UMU and variant √UGU were often assigned a negative sense, either as elaborations on the base root negative √Ū or sometimes (especially in the case of √UGU) serving as its source. The earliest iteration of these more elaborate negative roots was ᴱ√UMU or ᴱ√UVU in the Qenya Lexicon of the 1910s with derivatives like the negative verb ᴱQ. um- or ᴱQ. uv- as well as ᴱQ. ūvanimo “monster” (QL/98). ᴱQ. munta “nothing” from the Qenya Grammar of the 1920s was probably related (PE14/48, 81).
The Etymologies of the 1930s had negative stems ᴹ√UMU and ᴹ√UGU with derivatives like the negative verb ᴹQ. um- as well as ᴹQ. úmea “evil” (Ety/UGU; UMU). This document also had inverted forms ᴹ√MŪ and ᴹ√GŪ, the latter the basis for the negative prefix ᴹQ. ú- with a bad or evil connotation (Ety/GŪ; MŪ). Finally both √UMU and √UGU were mentioned a number of times in later writings in connection to negation (PE17/143, 172; VT49/29). See the entry on negative √Ū and the entry on Quenya negation for further information.