Lewis Short
sĭlesco, ĕre
* V. inch. n. [sileo], to become still, silent, calm, or quiet (rare; not in Cic.; syn. obmutesco): dum hae silescunt turbae,Ter. Ad. 5, 2, 10: deum domus alta silescit,Verg. A. 10, 101: caeli furor aequinoctialis Zephyri silescit auris,Cat. 46, 3: venti silescunt,Ov. Tr. 2, 151.
Charlton T. Lewis, Charles Short, A Latin Dictionary