radical

Square root sign

Radical can be a noun or an adjective with a range of meanings, most of which suggest something out of the ordinary.

A radical change is a big and fundamental one; radical surgery is extensive, and goes to the root of the problem.

Applied to any sort of political thought, radical characterizes the most extreme version of it.

A radical is one who embraces radical thinking or actions.

Radical in chemistry and math is short for free radical and radical sign, respectively.

political

leftist

Advocate for progressive politics

militant · dissident · insurgent · reformer · agitator · firebrand · zealot · extremist · subversive · guerrilla

innovative

groundbreaking

Introducing radical new ideas

disruptive · avant-garde · cutting-edge · visionary · unconventional · bold · daring · experimental · boundary-pushing · trailblazing

extreme

drastic

Severe and far-reaching

thoroughgoing · uncompromising · severe · intense · complete · total · profound · comprehensive · fundamental · extensive

chemistry

electron

Negative subatomic particle

antioxidant · hydroxyl · superoxide · peroxide · ion · unstable · molecule · oxygen · nitrogen · polymerization

mathematics

square root

Number times itself equals original

index · radicand · simplify · irrational · expression · notation · symbol · coefficient · denominator · rationalize

fundamental

root

Underground absorbing structure

  • baseSupporting bottom structure
  • coreCentral essential portion
  • essenceFundamental nature of something

foundation · principle · basic · underlying · elementary · primary · intrinsic · origin · source · bedrock

activism

protest

Public expression of disapproval

direct action · sit-in · boycott · march · picketing · solidarity · organizing · mobilization · consciousness-raising · resistance

Categories
Opposites
political stance

radicalconservative

Cautious about altering customs

moderate · reactionary · traditionalist · centrist · middle-of-the-road

degree of change

radicalmoderate

Lessen intensity or preside

conservative · incremental · gradual · middle-of-the-road · gradualist

depth or fundamentality

radicalsuperficial

Lacking depth or substance

surface · peripheral · cosmetic · shallow · incidental

Phrases
Family

eradicate, radically, eradication, radicalism, radicals, radicle, radicalize, radicalization, radicalness

Familiarity
Top 50,000
Profile
Known to kids · Used worldwide · Timeless · Abstract · Everyday, not technical · Rated PG