Lewis Short
(verb) : circum-sĭlĭo, īre, salio
* To spring, leap, or hop around (rare): (passer) circumsiliens modo huc, modo illuc, * Cat. 3, 9.— Trop., to leap about, surround: morborum omne genus, * Juv. 10, 218.
Charlton T. Lewis, Charles Short, A Latin Dictionary