Palāsa¹

masculine & neuter

1. the tree Butea frondosa or Judas tree Ja.iii.23 (in Palāsa Jātaka).
2. a leaf; collectively (nt.) foliage, pl. (nt.) leaves SN.ii.178; Ja.i.120 (nt.); Ja.iii.210, Ja.iii.344; Pv-a.63 (˚antare; so read for pās’ antare), Pv-a.113 (ghana˚), Pv-a.191 (sāli˚). puppha˚ blossoms & leaves Dhp-a.i.75; sākhā˚; branches & leaves MN.i.111; Ja.i.164; Mil.254; paṇḍu˚; a sear leaf Vin.i.96; Vin.iii.47; Vin.iv.217; bahala˚; (adj.) thick with leaves Ja.i.57
   ■ palāsāni (pl.) leaves Ja.iii.185 (= palāsapaṇṇāni C.); Pv-a.192 (= bhūsāni).

Vedic palāśa

Palāsa² & Paḷāsa

unmercifulness, malice, spite. Its nearest synonym is yuga-ggāha (so Vb.357; Pp.18, where yuddhaggāha is read; Ja.iii.259; Vv-a.71); it is often combined with macchera (Vv.15#5) and makkha (Mil.289). MN.i.15, MN.i.36, MN.i.488; AN.i.79; Ja.ii.198; Vb.357; Pp.18 (+ paḷāsāyanā, etc.)
■ apaḷāsa mercifulness MN.i.44.

according to Trenckner, Notes 83, from ras, but BSk. pradāśa points to pa dāśa = dāsa “enemy” this form evidently a Sanskritisation