ubbilāvita

happy, elated, buoyant, ltt. frisky; only in compounds -atta rejoicing, exultancy, elation of mind DN.i.3, DN.i.37; Ja.iii.466; Mil.183; DN-a.i.53, DN-a.i.122; and -ākāra id. Dhp-a.i.237. At Vism.158 “cetaso ubbilāvitaṃ stands for ubbilāvitattaṃ, with variant reading BB uppilāvitaṃ. Cp Ja.v.114 (ubbilāvita-cittatā).

according to the very plausible expln. given by Morris J.P.T.S. 1887, 137 sq. for uppilāpita, pp. of uppilāpeti = uplāpeti d. under uppilavati ud + plu; with ll for l after cases like Sk. ālīyate → P allīyati, ālāpa → allāpa etc., and bb for pp as in vanibbaka = Sk. vanīpaka (*vanipp˚)