flatten

To make something flat or flatter.

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

Mary would flatten the dough before rolling it into pretzels.

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

With a bolt of fright he remembered that there was no bathroom in the Hob-house Room. He leapt along the corridor in a panic, stopping by the long-case clock at the end where he flattened himself against the wall.

To knock down or lay low.

The prize fighter quickly flattened his challenger.

To become flat or flatter; to plateau.

Prices have flattened out.

To be knocked down or laid low.