1. “shouting out,” sound; fame, renown; speech, utterance, proclamation word of reproach, blame SN.i.190; AN.iv.88 (appa˚ noiseless lit. of little or no noise); Snp.719, Snp.818 (= nindāvacana Snp-a.537), Snp.1061; Ja.i.64; Ja.vi.83; Vv.5#5; Mnd.150 Cnd.344; Dhs.621; Vv-a.140 (madhura˚); Vv-a.334 (in quotation appa-sadda, appa˚); Sdhp.245.
2. (adj. noiseless, quiet, still Snp.959 (= appasadda appanigghosa Mnd.467).

Sk. nirghoṣa, nis + ghosa