adjective
(in compounds) having its ground in; founded on
Vatthuka (adjective) (—°) [from vatthu 1 ] 1. having a site or foundation or ground, in ucca° (high) and nīca° (low) Vin II 117, 120; Mhv 33, 87. 2. having its ground in, founded on, being of such and such a nature or composition S IV 67 (vācā°); Paṭis I 130 (micchā-diṭṭhi°, correct in Index JPTS 1908!); Vibh 319 (uppanna°; + ārammaṇa), 392 (micchā-diṭṭhi°); Vibh-a 403 (uppanna° etc.).
(adj, adj, in comps, from vatthu) based on; founded on; grounded on having its ground in, founded on Construction: √vas + tu + ka vastu + ka