A root in The Etymologies of the 1930s glossed “bend, hook” with a single derivative ᴹQ. rempa “crooked, hooked” (Ety/REP). The root was initially writing as ᴹ√REK as a variant of ᴹ√RIKH, but this was rejected (EtyAC/REP).
Middle Primitive Elvish
ben
root. corner (from inside), angle from inside
besnō
noun. husband
rep
root. bend, hook
rayak
root. *crooked, bent, wrong
kuʒnā
adjective. bowed, bow-shaped, bent
n(d)ur
root. bow down, bend (low), obey, serve; grow/be dark
pen(ed)
root. *hillside, slope
(n)di
root. in
al
prefix. without
dēr
noun. man
imi
root. in
kantaya
adjective. shapely
katwārā
adjective. shapely
kwen(ed)
root. Elf
kwenedē
noun. Elf
kwentā
noun. tale
ragnā
adjective. crooked
skwar
root. crooked
This root appeared in The Etymologies of the 1930s as ᴹ√SKWAR “crooked” with derivatives like ᴹQ. hwarin “crooked” and Dan. swarn “perverse, obstinate, hard to deal with” (Ety/SKWAR). In red-ink revisions to the Outline of Phonology (OP2) from the 1950s Tolkien decided that the initial combination skw- was not possible (PE19/78 and note #51). For purposes of Neo-Eldarin, this root might be salvaged by assuming its actual form was ᴺ√SWAR.
A (Noldorin only?) root in The Etymologies of the 1930s glossed “corner (from inside), angle from inside” with only one derivative, N. bennas “angle” (Ety/BEN). It might be a latter iteration of ᴱ√VENE “shape, cut out, scoop” from the Qenya Lexicon of the 1910s (originally glossed “small boat”) with derivatives like ᴱQ. vene/G. bent “small boat” and ᴱQ. venie/G. benn “shape, cut” (QL/100-101; GL/22).