ar (2) noun "day" (PE17:148), apparently short for árë, occurring in the names of the Valinorean week listed below. Tolkien indicated that ar in these names could also be arë when the following element begins in a consonant (VT45:27). Usually the word for "day" in LotR-style Quenya is rather aurë (or ré), q.v.
Quenya
ré
day
ré
noun. day (period from sunset to sunset)
ré
noun. day in calendar
ar
day
noa
former
noa (2) adj. "former", also adv. (and noun?) "yesterday", shortened from the full phrase noa ré "former day" (VT49:34). In other conceptual phases, Tolkien used noa for "tomorrow" _(VT49:20). _Compare enwa.
resta
sown field, acre
resta noun "sown field, acre" (VT46:11 cf. RED-). The word parma-restalyanna, probably meaning *"(up)on your book-fair", seems to use #resta in the sense of "fair" (as held in a field?) Carl F. Hostetter however suggests that #resta "fair" may be related to ré "day" (VT49:39-40); if so this word is wholly distinct from resta "sown field".
sana
day (24 hours)
sana (2) noun "day (24 hours)" (LT1:250; the later word ré is to be preferred to this early "Qenya" form)
Ae
day
Ae (Quenya?) noun "day" (LEP/LEPEN/LEPEK - ae was written over ar [# 2] in the names of the Valinorean week, but ar was not struck out.)
ala
day
[ala (7) noun "day", also alan "daytime". The forms allen, alanen listed after these words could be inflected forms of them, genitive "of daytime", constracted (allen = al'nen) and uncontracted. However, Tolkien struck out all of this (VT45:13).]
opto
noun. back
pontë
back, rear
pontë (ponti-) noun "back, rear" (QL:75)
resta
noun. sown field
sown field, tilled ground, acre
árë
day
árë noun "day" (PM:127) or "sunlight" (SA:arien). Stem ári- _(PE17:126, where the word is further defined as "warmth, especially of the sun, sunlight"). Also name of tengwa #31; cf. also ar # 2. Originally pronounced ázë; when /z/ merged with /r/, the letter became superfluous and was given the new value ss, hence it was re-named essë (Appendix E)_. Also árë nuquerna *"árë reversed", name of tengwa #32, similar to normal árë but turned upside down (Appendix E). See also ilyázëa, ilyárëa under ilya. In the Etymologies, this word has a short initial vowel: arë pl. ari (AR1)
catta
noun. back
A neologism for “back” coined by Paul Strack in 2022 specifically for Eldamo, based on Q. ca(ta) “behind, at back of place”. This word can refer to the back of body as well as the back of other things.
ré noun "day" (of the sun), a full 24-hour cycle (Appendix D) composed of aurë (day, daylight) and lómë "night" (VT49:45). Short -rë in compounds like Ringarë (q.v.). Allative rénna (VT49:45).