for nis (q.v.) before c, ch.
for nis, in comp. See p. 542, col. 3.
cl. 1. P. neśati, to meditate upon, be absorbed in meditation, [Dhātup. xvii, 73.]
f. (occurring only in some weak cases as niśi, °śas, °śau, °śos [and niḍbhyas, [Pāṇ. vi, 1, 63]], for or with niśā, and prob. connected with nak, nakta; cf. also dyu-, mahā-) night, [Mn.]; [MBh.]; [Var.]; [Śak.] &c.
niśi niśi, every night, [Mn. iv, 129.]