radical

1 radical /ˈrædɪkəl/ adjective
1 radical
/ˈrædɪkəl/
adjective
Britannica Dictionary definition of RADICAL
[more radical; most radical]
1 
a  : very new and different from what is traditional or ordinary
b  : very basic and important
2 
: having extreme political or social views that are not shared by most people
3 
US slang, somewhat old-fashioned : very appealing or good

— radically

/ˈrædɪkli/ adverb

— radicalness

noun [noncount]
2 radical /ˈrædɪkəl/ noun
plural radicals
2 radical
/ˈrædɪkəl/
noun
plural radicals
Britannica Dictionary definition of RADICAL
[count]
: a person who favors extreme changes in government : a person who has radical political opinions