A root Tolkien mentioned in the Quenya Verbal System of the 1940s with a single derivative ᴹQ. tatalla- “admire, wonder at” (PE22/110). There are no signs elsewhere of this root being used with this meaning: typically √TAL = “foot”.
Middle Primitive Elvish
ap
root. ?cook
tal
root. appraise, esteem, value
tul
root. come, approach, move towards (point of speaker)
sab
root. juice
This root was one of a surprisingly large number of roots Tolkien used for “juice”, appearing as ᴹ√SAB in The Etymologies of the 1930s with derivatives ᴹQ. sáva/N. saw “juice” (Ety/SAB). It might be a variant of (hypothetical) early root ✱ᴱ√WASA needed to explain the forms G. gwâs and ᴱQ. vasa “juice” in the Gnomish Lexicon of the 1910s (GL/44). The primitive form ᴹ✶sāba also appeared in a rough 1940 note with the word N. iofog “fruit drink”, though Tolkien ultimately decided the second element was derived from ᴹ√SUK “drink” (TMME/53).
Neo-Eldarin: For purposes of Neo-Eldarin, I would assume this root refers mainly fruit juice and pulp, as opposed to syrup and tree sap which would be derived from ᴹ√PIS.
abtā-
verb. to away, go away
nem-
verb. to seem
parkā
adjective. dry
adnō
noun. gate
anār
noun. Sun
ed(er)
root. open
A deleted root in The Etymologies of the 1930s with the gloss “open” and the forms √ED and extended √EDÉR, but it had no derivatives (EtyAC/ED).
epe
preposition. after
khil
root. follow
pantā
adjective. open
parmā
noun. book
tul-
verb. come, am coming, have come, am arrived, am here
tundu
noun. hole
The root √AP appeared in The Etymologies of the 1930s as the basis for the words ᴹQ. apsa, N. aes “meat, cooked food” (Ety/AP). Tolkien glossed this root as “cook” which he marked with a “?”, then deleted the gloss (EtyAC/AP). Despite this deletion, I’ve seen a few Neo-Elvish writers use this root as the basis for verbs “to cook”, but I personally find this problematic as such forms tend to collide with words like Q. apta- “to refuse” < √BĀ/ABA. I prefer to retain the Early Qenya and Gnomish words ᴱQ. maxa- and G. brath- for “to cook”.