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      Radical

      /ˈræd.ɪ.kəl/

      Meaning & Definition

      noun
      A person who advocates for fundamental or extreme political or social reform.
      As a young radical, she fought for civil rights and justice.
      A symbol (usually represented as a root sign) indicating the root of a number in mathematics.
      To simplify the expression, he identified the radical as √16 which equals 4.
      adjective
      Relating to the fundamental or foundational nature of something; extreme or far-reaching.
      The activists proposed radical changes to the education system to promote equality.
      Characterized by a departure from tradition; innovative or progressive.
      His radical approach to solving the city's transportation problems caught everyone's attention.
      In chemistry, pertaining to a group of atoms behaving as a single unit.
      The radical structure in the compound was essential for its reactivity.

      Etymology

      From Latin 'radicalis', meaning 'of or having roots'.

      Common Phrases and Expressions

      radical change:
      A significant and transformative change.
      radical idea:
      An idea that deviates significantly from the norm.
      radical movement:
      A social or political movement advocating for substantial change.

      Related Words

      radicalism
      The beliefs or actions of those who advocate for extreme reforms.
      radicalize
      To make or become radical in outlook or behavior.
      radicalist
      A person who advocates for radical changes.

      Slang Meanings

      Awesome or excellent.
      That concert was radical!
      Cool or impressive.
      Check out my new skateboard; it's radical!