Margo had time to leave the radio as a clue for us, and to prevent anyone from discovering it.

He really wished to prevent her from discovering life.

Or to prevent us from discovering that you had The Piggy?

"You get the feeling the universe is trying to prevent us from discovering the truth."

"The only possible reason would be to prevent the captain from discovering more information on the infectious entities."

I closed my eyes, to prevent him from discovering what effect on me his speech was having.

This prevented us from discovering the full extent of the enrollment irregularities.

V has since been eliminating the camp's former officers to prevent the government from discovering his true identity.

With verbal interruptions, they prevented either of them from discovering the truth, temporarily.

Something that would prevent the Sarkassians from discovering what we're up to.