[{"Bold_text": "verb (used without object)", "List Items": ["to laugh softly or amusedly, usually with satisfaction:They chuckled at the child's efforts to walk.", "to laugh to oneself:to chuckle while reading.", "Obsolete.to cluck, as a fowl."]}, {"Bold_text": "noun", "List Items": ["a soft laugh, usually of satisfaction.", "Obsolete.the cluck of a hen."]}]