過激 (かげき)extreme; radical

extreme; radicaladjectival nouns or quasi-adjectives (keiyodoshi), noun (common) (futsuumeishi)

過激, its kanji, and other words that share them.Open this graph

Kanji in 過激

過去かこthe past; bygone days
過程かていprocess; course
過半数かはんすうmajority
経過けいかpassage (of time); elapsing
通過つうかpassing through (a tunnel, station, town, etc.); passing by (e.g. of a typhoon)
過ぎすぎpast; after
過剰かじょうexcess; surplus
過失かしつaccident (caused by negligence); error
刺激しげきstimulus; impetus
急激きゅうげきsudden; abrupt
激戦げきせんfierce battle; hard-fought battle
激動げきどうviolent shock; agitation
激化げきかintensification; aggravation
感激かんげきdeep emotion; impression
激励げきれいencouragement; spurring (on)
激変げきへんsudden change; upheaval

See how 過激 connects to the rest of Japanese.