[{"Bold_text": "verb (used with object)", "List Items": ["to push or carry to excess; overwork.", "to drive too hard."]}, {"Bold_text": "noun", "List Items": ["Machinery, Automotive.a device containing a gear set at such ratio and arrangement as to provide a drive shaft speed greater than the engine crankshaft speed.", "Also called hyperdrive .Informal.a state of intense activity or productivity:The political campaign has shifted into overdrive."]}]