An adjective for “crooked” in The Etymologies of the 1930s under the root ᴹ√SKWAR of the same meaning (Ety/SKWAR).
Middle Primitive Elvish
skwar
root. crooked
ragnā
adjective. crooked
There are more words but they are from Tolkien's earlier conceptional periods. Tolkien likely changed these words as he evolved the aesthetics and completeness of the languages. You may even find languages that Tolkien later rejected. Do not mix words from different time periods unless you are familiar with the phonetic developments.
Qenya
hwarin
adjective. crooked
Gnomish
craig
adjective. crooked
gwegla
adjective. crooked
Early Noldorin
gaug
adjective. crooked
gog
adjective. crooked
gwag
adjective. crooked
Early Quenya
pereqa
adjective. crooked
Old Noldorin
ragna
adjective. crooked
Below: Tolkien's Late Period (1950–1973). These are from Tolkien's late conceptual period — his most settled forms of the languages. Prefer these over the earlier ones above when composing new text.
Primitive elvish
swā
root. echoic representation of sound of wind
swar
root. crooked
raika
adjective. crooked
Noldorin
rhaen
adjective. crooked
rhaen
adjective. crooked
The Etymologies of the 1930s had N. rhaen “crooked” derived from from primitive ᴹ✶ragnā under the root ᴹ√RAG (Ety/RAG).
Neo-Sindarin: Many Neo-Sindarin writers adapt this adjective as ᴺS. raen as suggested in HSD (HSD), since the unvoicing of initial r to rh was a feature of Noldorin of the 1930s but not Sindarin of the 1950s and 60s. However, in this case the nearest equivalent root in Tolkien’s later writing is √SRAG “awkward, hard, difficult” (PE17/154, 158, 172, 185). Using this root I would keep the form ᴺS. rhaen “crooked” without modification, since primitive sr- produces rh- in Sindarin. This eliminates conflicts with several later Sindarin words of the form raen.
Conceptual Development: The Gnomish Lexicon of the 1910s had G. gwegla “crooked” based on the early root ᴱ√gwedh- (GL/46), and it also had G. craig “crooked” (GL/46), probably based on the early root ᴱ√KṚKṚ (QL/48). The word craig “crooked” also appeared in Gnomish Lexicon Slips modifying that document (PE13/111). The Early Noldorin Grammar of the 1920s instead had ᴱN. gwag or gog “crooked” (PE13/122), and Early Noldorin word-lists from this same period had {gog >>} gaug “crooked” (PE13/144).
rhoeg
adjective. crooked, bent, wrong
Sindarin
raeg
adjective. crooked, bent, wrong
raen
adjective. crooked
raen
crooked
raen (no distinct pl. form). Note: a homophone means ”netted, enlaced”.
raen
adjective. crooked
raen
crooked
(no distinct pl. form). Note: a homophone means ”netted, enlaced”.
rhaen
adjective. crooked
Quenya
cauca
crooked
cauca _("k")_adj. "crooked" (LT1:257; cf. #caw-)
hwarin
crooked
hwarin adj. "crooked" (SKWAR)
raica
crooked, bent, wrong
raica ("k") adj. "crooked, bent, wrong" (RÁYAK, VT39:7), pl. raicar in LR:47 (read perhaps *raicë in LotR-style Quenya)
raica
adjective. crooked, crooked, [ᴹQ.] bent, wrong
A word for “crooked” derived from √RIK “twist” appearing in notes associated with the Quendi and Eldar essay of 1959-60 (VT39/7, 9). ᴹQ. raika also appeared in The Etymologies of the 1930s with the glosses “crooked, bent, wrong” under the root ᴹ√RAYAK (Ety/RÁYAK). It appeared in its (1930s-style) plural form raikar in various versions of the Lament of Atalante from the 1930s and 40s in the phrase ilya sí maller raikar “now all roads (are) bent” (LR/47; LR/56; SD/310).
Note that The Etymologies of the 1930s also had ᴹQ. téra “straight, right” (Ety/TEƷ). So it seems Quenya used the metaphor “straight = right” and “crooked = wrong” (at least in the 1930s).
Conceptual Development: The Qenya Lexicon of the 1910s had similar forms ᴱQ. pere̜qa “crooked” and ᴱQ. perqa “wrong” (QL/73).
rempa
crooked, hooked
rempa adj. "crooked, hooked" (REP)
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.