[{"Bold_text": "noun", "List Items": ["a device for riding upon, usually while standing, consisting of a short, oblong piece of wood, plastic, fiberglass, or aluminum mounted on large roller-skate wheels, used on smooth surfaces and requiring better balance on the part of the rider than ordinary roller skates roller skatesdo:Skateboards were pretty “primitive” back in the sixties."]}, {"Bold_text": "verb (used without object)", "List Items": ["to ride a skateboard:She skateboarded during her lunch break nearly every day."]}]