subversion
subversive activity

The less he knew about her subversive activities, the better for both of them.

"We are gathering evidence about their subversive activity," he said.

One day the department chairman tells you that he has received a report about your "subversive activities."

"That he might give an accounting of his subversive activities among the lower classes."

He was arrested on two occasions during his university studies for subversive activities.

In 1940, he was imprisoned on charges of subversive activities.

Thus, the local leaders freely but quietly continued their subversive activities.

There, Fried became involved in the company's union, and was fired for subversive activities.

A ministerial committee found no evidence of subversive activity in the university.

He did not arrest anyone caught in subversive activities, but simply dismissed them.