A word appearing in Definitive Linguistic Notes (DLN) from 1959 glossed “innumerable” as a combination of pen “without” and the gerund of noedia- “to count”. The oe [œ] is archaic and the modern form would be pennediad.
Sindarin
pen-noediad
adjective. innumerable
pennoediad
adjective. innumerable
arnœdiad
adjective. innumerable, countless, endless, without reckoning, numberless
aronoded
innumerable
aronoded (countless, endless), pl. erenedid (archaic erönödid)
aronoded
innumerable
(countless, endless), pl. erenedid (archaic erönödid)
adj. innumerable.