激 - violent, get excited, enraged

fierce battle; hard-fought battle; hot contest; severe fight

crash; smashing (into); ramming; (violent) collision

raging stream; rapids

stimulus; stimulation; irritation (esp. of the body, e.g. skin, eyes)

intensification; aggravation

dramatic decrease; sharp drop; sudden fall

violent shock; agitation; turbulence; turmoil; upheaval; excitement

intense; violent; severe; vehement

violent emotion; passion; fury

rage; fury

violent; furious; tempestuous

heated argument; heated discussion; heated debate