Flattened

To make something flat or flatter.

"As there was a lot of damage, we chose the heavy roller to flatten the pitch."

To press one's body tightly against a surface, such as a wall or floor, especially in order to avoid being seen or harmed.

To knock down or lay low.

"The prize fighter quickly flattened his challenger."

To become flat or flatter; to plateau.

"Prices have flattened out."

Made flat by something.

"We removed the fallen tree from the flattened car."