[{"Bold_text": "noun", "List Items": ["a slender, typically rod-shaped rigid piece of metal, usually in any of numerous standard lengths from a fraction of an inch to several inches and having one end pointed and the other enlarged and flattened, for hammering into or through wood, other building materials, etc., as used in building, in fastening, or in holding separate pieces together.", "a thin, horny plate, consisting of modified epidermis, growing on the upper side of the end of a finger or toe.", "a former measure of length for cloth, equal to 2.25 inches (5.7 centimeters)."]}, {"Bold_text": "verb (used with object)", "List Items": ["to fasten with a nail or nails:to nail the cover on a box.", "to enclose or confine (something) by nailing (often followed byup):to nail up oranges in a crate.Synonyms: fasten , pin , secure , fix", "to make fast or keep firmly in one place or position:Surprise nailed him to the spot.", "to accomplish perfectly:the only gymnast to nail the dismount.", "Informal.to secure by prompt action; catch or seize:The police nailed him with the goods.to catch (a person) in some difficulty, lie, etc.to detect and expose (a lie, scandal, etc.).", "to secure by prompt action; catch or seize:The police nailed him with the goods.", "to catch (a person) in some difficulty, lie, etc.", "to detect and expose (a lie, scandal, etc.).", "Slang.to hit (a person):He nailed him on the chin with an uppercut in the first round.", "to focus intently on an object or subject:She kept her eyes nailed on the suspicious customer.", "Obsolete.to stud with or as if with nails."]}, {"Bold_text": "verb phrase", "List Items": ["to make final; settle once and for all:Signing the contract will nail down our agreement."]}]