Title of a work by the sage Quennar (MR/57), probably a compound of yén “year” and ✱onótië, as suggested by Helge Fauskanger (QQ/onótië).
Quenya
#onótië
reckoning
onótië
noun. *reckoning
yénonótië
proper name. *Reckoning of Years
not-
reckon
not- vb. "reckon" (NOT); compare onot-. Passive participle nótina "counted, reckoned" (FS), nótima "countable" (PE17:68), #notië "counting, reckoning" in maquanotië "decimal system" (VT47:10), variant #nótië in caistanótië of similar meaning (VT48:11).
nótië
counting
#nótië "counting", isolated from caistanótië, q.v.
yén
long year
yén noun, Elvish "long year" of 144 solar years, 52,596 days (Nam, Appendix D, E; RGEO:66. Tolkien earlier defined yén_ as 100 solar years; see PM:126. In the Etymologies, stem YEN, it seems to mean simply "year", but in the LotR Appendices the word for "year" instead appears as _loa or coranar, q.v.) Yénonótië "reckoning of years" (MR:51). Pl. yéni in Nam and Etym, entry YEN though the plural form is misread as "yen-" in the printed version of the Etymologies, cf. VT46:23. Yéni pa yéni "years upon years" (VT44:36). Pl. genitive yénion in yénion yéni "ages of ages" (VT44:36)
#onótië noun "reckoning" (isolated from Yénonótië *"reckoning of years", MR:51)