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English Lexicon

Radical

/ˈræd.ɪ.kəl/
nounadjectiveCEFR B2 (Upper)Top #2100 frequency
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Comprehensive Definitions & Senses

2 senses
As adjective
  1. 1

    Affecting the fundamental nature of something; far-reaching or thorough.

    "There is a need for radical changes in education."
As noun
  1. 1

    A person who advocates thorough or complete political or social reform.

    "He was known as a political radical in his youth."
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Linguistic Origin & Historical Etymology

Derived from the Late Latin radicalis, meaning 'of or belonging to a root', stemming from the Latin radix (root). Originally entering English in the 14th century in an astrological and botanical sense, it evolved through the 17th century to describe foundational or fundamental elements, and later acquired political and mathematical connotations.

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