1
to make (someone) angry;to anger;to offend;to rile up;to provoke (to anger)
See also:
怒らせる (おこらせる)
その猫を怒らすとひっかくよ。
The cat will scratch you if you provoke it.
2
to square (one's shoulders);to raise (one's voice) in anger;to make (one's eyes) glare
See also:
怒らせる (おこらせる)