indeclinable allowable, possible (with inf.); usually neg (thus = Prohibitive!) Snp.393 (na l. phassetuṃ; Snp-a p.376 explains by “sakkā”), Snp.590; Pv.ii.6#10; Ja.i.64 (na l. tayā pabbajituṃ), Ja.i.145 (id.), Pv-a.96 (= laddhuṃ sakkā).

best to be taken, with Pischel, Prk. Gr. § 465, as an old Opt. 3^rd sg., like sakkā which corresponds to Vedic śakyāt. Thus labbhā = *labhyāt, as in Māgadhī