sub·ver·sion 
(səb-vûrzhən)
(səb-vûrzhən)n.
1.
a. The act or an instance of subverting.
b. The condition of being subverted.
2. Obsolete Overthrow or ruin.
[Middle English subversioun, from Old French subversion, from Late Latin subversiō, subversiōn-, from Latin subversus, past participle of subvertere, to subvert; see SUBVERT.]
sub·version·ar′y adj.