Lewis Short
dis-sĕrēno, āre
* V. impers. and a.
* Impers., to be clear, as if by dispersing the clouds: si cacumina (montium) pura flent, disserenabit,Plin. 18, 35, 82, § 356.
* In late Lat., act., to make clear.—Only trop., to clear away: disserena oculis nostris nubilum,August. Conf. 13, 15; to cheer: mores procellosos,Cassiod. Var. 6, 6 init.
Charlton T. Lewis, Charles Short, A Latin Dictionary