[{"Bold_text": "noun", "List Items": ["a pin, wedge, key, or the like, fitted or driven into an opening to secure something or hold parts together.", "cotter pin cotter pin."]}, {"Bold_text": "verb (used with object)", "List Items": ["to secure with a cotter."]}, {"Bold_text": "noun", "List Items": ["Scot.a person occupying a plot of land and cottage, paid for in services.", "cottager(def2) cottager(def2)."]}]