[{"Bold_text": "noun", "List Items": ["a heavy steam-powered vehicle having a roller crushing, compacting, or leveling materials used for a road or the like.", "(not in technical use) any similar vehicle with a roller .", "an overpowering force, especially one that crushes all opposition with ruthless disregard for individual rights."]}, {"Bold_text": "verb (used with object)", "List Items": ["to crush or flatten with a steamroller.", "to overcome with superior force:to steamroller the competition.", "to bring about the adoption of by overwhelming pressure:to steamroller the resolution through."]}, {"Bold_text": "verb (used without object)", "List Items": ["to proceed with implacable force."]}, {"Bold_text": "adjective", "List Items": ["suggestive of a steamroller; ruthlessly overpowering:steamroller tactics."]}]