Vikasati¹

to open (out), to expand, to blossom fully (of flowers)
pp vikasita. Caus. vikāseti to open Ja.vi.364 (hatthaṃ).

vi + kas

Vikasati²

to shine; Caus. vikāseti to illuminate D Avs.v.47 (mukh’ ambuja-vanāni vikāsayanto).

vi + kāś, cp. okāsa