adjective (masculine)
Natthika (adjective/noun) [Sanskrit nāstika] one who professes the motto of "n'atthi," a sceptic, niḥlist S I 96; usually in compounds -diṭṭhi scepticism, niḥlistic view, heresy Snp 243 (= micchā-ditthi commentary); Vv-a 342; Pv-a 244; -vāda one who professes a niḥlistic doctrine S III 73; M I 403; A II 31; Pv-a 215 (+ micchā-diṭṭhika).
an unbeliever (in the existence or efficacy of good conduct, in the existence of another world, etc.); a skeptic
(adj, adj, from na atthi) nihilistic; not believing; atheistic; not believing in the efficacy of action or existence of the afterlife [lit.] there is nothing Construction: na + √as + ti + ka natthi + ka