Subversive means working quietly to undermine an established order. A subversive book, subversive humour, subversive activity.
The quiet part is essential: an open attack is not subversion. Applied to art it is often praise, and applied by a state to its citizens it is a charge that has justified a great deal of surveillance. The Latin means to turn from below.
1adjectivesubversiveWorking quietly to undermine an established order.
“The government banned the young poet's work, calling it subversive and dangerous.”
subversive is a quality.
Latin subvertere means to overturn — sub, from below, plus vertere, to turn.
See subvert and -ive.
Etymology from Wiktionary, CC BY-SA