[{"Bold_text": "verb (used with object)", "List Items": ["to prevent the success of; frustrate ; balk :Loyal troops foiled his attempt to overthrow the government.Synonyms: hamper , impede , thwart", "to keep (a person) from succeeding in an enterprise, plan, etc."]}, {"Bold_text": "noun", "List Items": ["Archaic.a defeat; check; repulse."]}, {"Bold_text": "noun", "List Items": ["metal in the form of very thin sheets:aluminum foil.", "the metallic backing applied to glass to form a mirror.", "a thin layer of metal placed under a gem in a closed setting to improve its color or brilliancy.", "a person or thing that makes another seem better by contrast:The straight man was an able foil to the comic.Synonyms: counterpart , complement , contrast", "Architecture.an arc or a rounded space between cusps, as in the tracery of a window or other ornamentation.", "an airfoil hydrofoil ."]}, {"Bold_text": "verb (used with object)", "List Items": ["to cover or back with foil.", "to set off by contrast."]}, {"Bold_text": "noun", "List Items": ["a flexible four-sided rapier having a blunt point.", "foils,the art or practice of fencing with this weapon, points being made by touching the trunk of the opponent's body with the tip of the weapon."]}]