A root in The Etymologies of the 1930s glossed “fear” (Ety/GÁYAS). One of its derivatives, N. gaer “dreadful” (< ᴹ✶gaisrā), was given a new etymology in the Quendi and Eldar essay of 1959-60, where S. gaer “awful, fearful” was derived from ✶gairā (WJ/400). However, it is conceivable that √GAYAS could have survived as an extension of the later root √GAY “astound, make aghast”.
Middle Primitive Elvish
nor
root. run as of wheels, roll along
yur
root. run
doron
root. oak
mā
noun. land
gayas
root. fear
gū
root. no, not
gū̆-
interjection. no, not
ñol-
noun. smell
A root in The Etymologies of the 1930s glossed “run” with derivatives like ON. yur- “run” and N. iôr “course” (Ety/YUR). It was a later iteration of ᴱ√ẎURU “run” from the Qenya Lexicon of the 1910s with derivatives like ᴱQ. yuro “a run, race” and ᴱQ. yuru- “run” (QL/106). For purposes of Neo-Eldarin, it is probably better to stick to the better attested root √NOR.