Radical

Wurzel

(mathematics: involving roots)

krass

(slang: excellent)

radikal

(thoroughgoing)

radikal

(favouring fundamental change)

radikalisch

(chemistry: involving free radicals)

Radikal

(linguistics: portion of a character that provides an indication of its meaning)

Radikal

(organic chemistry: free radical)

Radikale

(person with radical opinions)

Radikaler

(person with radical opinions)

Radix

(arithmetic: root (of a number or quantity))

Wurzel

(arithmetic: root (of a number or quantity))