[{"Bold_text": "adjective", "List Items": ["of or going to the root or ; fundamental:There is a radical difference between the two interpretations of the sacred text, one justifying war and the other requiring nonviolent resistance.Synonyms: ingrained , innate , original , essential , basic Antonyms: superficial", "extreme, especially as regards change from accepted or traditional forms:a radical change in the policy of the company.Synonyms: violent , immoderate , excessive , drastic , thorough , unqualified , complete Antonyms: superficial", "favoring drastic political, economic, or social reforms:radical ideas;radical and anarchistic ideologues.", "favoring, supporting, or representing extreme forms of religious fundamentalism:radical fundamentalists and their rejection of modern science.", "forming a basis or foundation:What is the radical reason for his choice?", "existing inherently in a thing or person:radical defects of character.", "characterized by a marked departure from prevailing methods, practices, or ideas, particularly in the arts; experimental; unorthodox:The composer’s radical approach to sound, using timbre and rhythm rather than pitch, was declared “noise” by an influential critic.", "Slang.excellent; wonderful; cool; rad:You got here on an electric skateboard? That's radical!", "Mathematics.pertaining to or forming a root .denoting or pertaining to the radical sign. irrational(def5b) irrational(def5b).", "pertaining to or forming a root .", "denoting or pertaining to the radical sign.", "irrational(def5b) irrational(def5b).", "Grammar.of or pertaining to the root of a word.", "Botany.of or arising from the root or the base of the stem."]}, {"Bold_text": "noun", "List Items": ["a person who holds or follows strong convictions or extreme principles; extremist.", "a person who advocates fundamental political, economic, and social reforms by direct and often uncompromising methods.", "Mathematics.a quantity expressed as a root of another quantity.the set of elements of a ring, some power of which is contained in a given ideal. radical sign(def) radical sign(def).", "a quantity expressed as a root of another quantity.", "the set of elements of a ring, some power of which is contained in a given ideal.", "radical sign(def) radical sign(def).", "Chemistry. group(def3) group(def3). free radical(def) free radical(def).", "group(def3) group(def3).", "free radical(def) free radical(def).", "Grammar. root1(def12) root1(def12).", "(in Chinese writing) one of 214 ideographic elements used in combination with phonetics to form thousands of different characters."]}]