Lewis Short
insānĭtas (noun F) : insanus
* Unsoundness, unhealthiness, disease: nomen insaniae significat mentis aegrotationem et morbum, id est insanitatem et aegrotum animum,Cic. Tusc. 3, 4, 8: sapientia sanitas sit animi, insipientia autem quasi insanitas quaedam,id. ib. 3, 5, 10; cf. Varr. ap. Non. 122, 28.
Charlton T. Lewis, Charles Short, A Latin Dictionary