A noun in The Etymologies of the 1930s glossed “corn” derived from the root ᴹ√YAB “fruit” (Ety/YAB). It had the rather unusual plural form iui, which seems to be the result of au becoming ui via i-intrusion in Noldorin of the 1930s and 40s (PE22/40): yābī > ı̯auvi > ı̯uiw(i) > iui. In Sindarin of the 1950s and 60s the result was instead oe, so the Sindarin plural of this word would likely be ✱ioew. As for the gloss “corn”, it was probably intended to have its British meaning as a general term for any cereal crop like wheat or oats.
Noldorin
iau
noun. ravine, cleft, gulf
iau
noun. corn, corn, *cereal crop
iau
noun. ravine, cleft, gulf
iau
noun. corn
iaun
noun. holy place, fane, sanctuary, holy place, fane, sanctuary, *shrine, temple
A noun for “holy place, fane, sanctuary” appearing in The Etymologies of the 1930s as a derivative of the root ᴹ√(A)YAN (Ety/YAN). Its Quenya cognate ᴹQ. yána suggests a primitive form yānā [jānā], with the medial primitive long vowel [ā] developing into the diphthong [au] as usual.
Conceptual Development: This word has no clear precursors in Tolkien’s earlier writings, but in the Gnomish Lexicon from the 1910s, the word G. gorthin was glossed “fane, temple” and G. alc(hor) was glossed “shrine, fane, temple” (GL/18, 42).
Neo-Sindarin: This word does not appear in Tolkien’s later writings, but it is consistent with the phonetic rules of Sindarin and a later version of its root √AYA(N) does appear (PE17/145), though it does conflict with iaun “wide”.
iaur
masculine name. Eldest
iaur
adjective. ancient, old(en)
iaun
noun. holy place, fane, sanctuary
iaur
adjective. ancient, old, original
iaur
adjective. older, former
erion
masculine name. Eldest
Earlier form of S. Iarwain appearing in Lord of the Rings drafts from the 1940s, translated “Eldest” and appearing beside N. Iaur (TI/125). It might be a superlative form of iaur “old”; in the Early Noldorin Grammar, the similar suffix -iant was used for the superlative (PE13/125). If the suffix -ion was a Noldorin superlative suffix, perhaps the initial [e] developed due to Noldorin i-affection.
brûn
adjective. old, that has long endured, or been established, or in use
ingem
adjective. old (of person, in mortal sense: decripit, suffering from old age)
New word coined by the Elves after meeting with Men
lhand
adjective. wide, broad
lhann
adjective. wide, broad
lhann
adjective. wide, wide, [ᴱN.] broad
pann
adjective. wide
pann
adjective. wide
rhess
noun. ravine
rhess
noun. ravine
rhis
noun. ravine
rhis
noun. ravine
ûr
noun. wide
ûr
adjective. wide
A noun in The Etymologies of the 1930s glossed “ravine, cleft, gulf” derived from the root ᴹ√YAG “yawn, gape” from primitive ᴹ✶yagwē (Ety/YAG).
Neo-Sindarin: I’d avoid this word for purposes of Neo-Sindarin, as it is easily confused with N. iau “corn” and has a number of other better-known alternatives like S. iâ “gulf” and S. cirith “ravine, cleft”.