English → Spanish
radical
/AmE ˈrædək(ə)l 
, BrE ˈradɪk(ə)l /
A
adjective
1 (far-reaching) ‹change/difference/reform› radical
radical surgery cirugía f radical
2 ‹politician/policy› radical; ‹writer› de ideas radicales, de tendencia radical
3 (new and daring) ‹technique/theory› innovador, radicalmente nuevo
B
noun
1 (person) radical mf
2 (Chemistry) radical m