bulldozer
/ˈbʊlˌdəʊzə(r)/noun
1- a powerful track-laying tractor with a broad curved upright blade at the front for clearing ground推土机。
1.1
- figurative a person, army, or other body exercising irresistible force, especially in disposing of obstacles or opposition〈喻〉横行霸道者：
the new Duke was a political bulldozer.
新公爵在政治上横行霸道。