To Anger Someone
To Provoke, To Offend Someone
ichidan verb
Remember how you learned that 怒る means "to get angry?" Well this is when someone else gets angry and it's because YOU made them angry. It means to anger someone.
おこらせる
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You learned this reading when you learned 怒る, so you should know this one too!
父さんを怒らせると後が面倒よ。
You’ll be in trouble after making dad mad.