Steamroller (noun)

1. A machine used for compacting or smoothing a surface, typically by driving over it.
2. A person or group that overpowers or crushes opposition with sheer force or authority.
3. An overpowering force or influence that does not allow for resistance or dissent.

Origin:

Derived from the verb 'to steamroll', meaning 'to crush or flatten with a steam-powered machine'. first recorded in english in the late 19th century.

Examples:

1. The steamroller was used to compact the dirt and prepare the ground for construction.
2. She was often accused of being a steamroller, bulldozing her way through any obstacle in her path.
3. The government was criticized for using the police as a steamroller to suppress dissent.
4. The steamroller was noisy and caused a commotion as it rolled down the street.
5. The steamroller was able to flatten the asphalt in record time, much to the delight of the construction crew.