sub ‧ vert /səbˈvɜːt $ -ˈvɜːrt/ BrE AmE verb [transitive] formal
[ Date: 1300-1400 ; Language: Old French ; Origin: subvertir , from Latin subvertere 'to turn from beneath, subvert' ]
1 . to try to destroy the power and influence of a government or the established system:
an attempt to subvert the democratic process
2 . to destroy someone’s beliefs or loyalty