radical
adjective /ˈrædɪkl/
  /ˈrædɪkl/
[usually before noun]- relating to the most basic and important parts of something; complete and detailed synonym far-reaching- the need for radical changes in education
- demands for radical reform of the law
- radical differences between the sexes
- This document marks a radical departure from earlier recommendations.
 
- new, different and likely to have a great effect- radical ideas
- a radical solution to the problem
- radical proposals
- a truly radical concept
 Oxford Collocations Dictionaryverbs- be
- seem
- sound
- …
 - extremely
- fairly
- very
- …
 
- in favour of extreme and complete political or social change- the radical wing of the party
- radical politicians/students/writers
 WordfinderTopics Politicsc1- capitalism
- communism
- democracy
- dictatorship
- fascism
- imperialism
- liberal
- radical
- socialism
 Oxford Collocations Dictionaryverbs- be
- seem
- sound
- …
 - extremely
- fairly
- very
- …
 
- (North American English, old-fashioned, slang) very good
Word Originlate Middle English (in the senses ‘forming the root’ and ‘inherent’): from late Latin radicalis, from Latin radix, radic- ‘root’.