To proofread.

To make resistant, especially to water.

To allow yeast-containing dough to rise.

To demonstrate that something is true or viable; to give proof for.

“I will prove that my method is more effective than yours.”

To turn out; to manifest.

“It proved to be a cold day.”

To turn out to be.

“Have an exit strategy should your calculations prove incorrect.”

Having been proved; having proved its value or truth.

“It's a proven fact that morphine is a more effective painkiller than acetaminophen is.”