彼女は息子がひどい扱いを受けたと憤慨していた。

She was indignant at the way her son had been treated.

少年は厄介者扱いをされて憤慨した。

The boy was fed up with being treated as a burden.

彼は友人の行動に憤慨した。

He resented his friend's action.

たまには酒にでも酔ってはじけて日頃の鬱憤晴らしたほうがいいんじゃないか。

Isn't it better to get drunk and cut loose once in a while and blow off the tension of daily frustration?

よくも自分を欺いたなと、伯父に対して憤りを感じた。

He felt resentment against his uncle for deceiving him.