niGa
nigha , m. (also nīgha , q.v. , and cf. anigha ), evil, sin : Mvy 7308 = Tib. sdig pa , sin . In Pali only anigha, anīgha seem to be in real use; nigha and nīgha are given in comms. and said to mean dukkha; they have the look of abstractions from anigha (anīgha); alternatively the comms. analyze an-īgha. Real etym. of anigha uncertain. But BHS seems clearly to have used nigha, and probably nīgha, independently ( tho perhaps by secondary backformation from an°).
Nigha 1 (nīgha) (adjective/noun) is invented by commentary and scholiasts to explain the combination anigha (anīgha sporadic, e.g. S V 57). But this should be divided an-īgha instead of a-nīgha. — (masculine) rage, trembling, confusion, only in formula rāgo n. doso n. moho n. explaining the adjective anīgha. Thus at S IV 292 = Nidd II §45; S V 57. — (adjective) anigha not trembling, undisturbed, calm [see etymology under īgha = Sanskrit r̥gh of r̥ghāyati to tremble, rage, rave] S I 54; IV 291; Ja V 343. Otherwise always combined with nirāsa: S I 12 = 23, 141; Snp 1048, 1060, 1078. Explained correctly at Pj II 590 by rāgādi-īgha-virahita. Spelling anīgha Ja III 443 (commentary niddukkha); Pv IV 1 34 (+ nirāsa; explained by niddukkha Pv-a 230). anīgha also at It 97 (+ chinnasaṃsaya); Ud 76; Dhp 295 (v.l. aniggha; explained by niddukkha Dhp-a III 454). Nigha 2 (neuter) [probably ni + gha = Sanskrit °gha of hanati (see also Pāli °gha), to kill; unless abstracted from anigha as in preceding nigha 1 ] killing, destruction Thig 491 (= maraṇasampāpana Thig-a 288).
(nt, nt, from na īgha) trouble, misery