A general word for “force” [physical, social and mental] derived from √NID “force, press(ure), thrust” and appearing in Late Notes on Verb Structure (LVS) from 1969 (PE22/165).
Quenya
níre
noun. force
nírë
tear
nírë
noun. force
nië
tear
nië noun "tear" (NEI, VT45:38, LT1:262, LT2:346); apparently níe in MC:221
Niélë
tear
Niélë fem. name (meaning unclear, cf. nië "tear"?), diminutive Nieliccilis ("k") noun "little Niéle" (MC:215; PE16:96). This may suggest that Niélë has the stem-form *Niéli-.
nírë noun "tear" (NEI)