Lewis Short
(verb) : dē-sīdo, sēdi (de-sīdi, Cic. l. l. infra, Lampr id. Alex. Sev. 39, 7), 3, , v. consido. —Of inanimate things, esp. of places
* To sink, fall, or settle down.
* Prop.: tantos terrae motus factos esse, ut multa oppida corruerint, multis locis labes factae sint terraeque desiderint,Cic. Div. 1, 35 fin.; 1, 43, 97; Liv. 32, 9; and poet. of the apparent sinking of mountains to one flying aloft: Gargara desidunt surgenti,Stat. Th. 1, 549: ovum inane natat, plenum desidit,Varr. R. R. 3, 9, 11; Just. 4, 1, 10: ex urina quod desidit album est,sediment,Cels. 2, 7: tumor ex toto desidit,id. 7, 18. —*
* Trop., to deteriorate, degenerate: desidentes mores, Liv. prooem. 9.
Charlton T. Lewis, Charles Short, A Latin Dictionary