Denshi Jisho — Online Japanese dictionary

怒る おこる 1: to get angry; to get mad;
2: to tell someone off; to scold
Common word, Godan verb with ru ending, Intransitive verb 
怒る いかる 1: to get angry; to get mad;
2: to be angular; to be square
Godan verb with ru ending, Intransitive verb 

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