steamroller
US /ˈstiːmˌroʊ.lɚ/
UK /ˈstiːmˌroʊ.lɚ/

1.
a large, heavy vehicle with a wide roller, used for flattening surfaces, especially in road construction
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The steamroller compacted the asphalt on the new road.
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You can hear the rumble of the steamroller from a distance.
2.
an overwhelming force or influence that crushes opposition or resistance
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The company's new policy was a steamroller, crushing all dissent.
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His arguments came at them like a steamroller, leaving no room for debate.
1.
to crush or overcome with overwhelming force
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The government tried to steamroller the new legislation through parliament.
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He tends to steamroller over anyone who disagrees with him.