Abbhattha (neuter) [abhi + attha 2 in accusative abhi + atthaṃ, abhi in function of "towards" = homeward, as under abhi I.1.a; cf. Vedic abhi sadhasthaṃ to the seat R̥V IX. 21.3] = attha 2 , only in phrase abbhatthaṃ gacchati "to go towards home", i.e. setting; figurative to disappear, vanish, M I 115, 119; III 25; A IV 32; Miln 305; past participle abhhatthaṅgata "set", gone, disappeared Dhs 1038 (atthaṅgata + a.); Kv 576.
(nt, nt, from attha) setting; disappearance [lit.] homeward Construction: abhi > abhy > abbh + attha