gǎn nù ér bù gǎn yán

ㄍㄢˇ ㄋㄨˋ ㄦˊ ㄅㄨˋ ㄍㄢˇ ㄧㄢˊ

Idiom

1unable to voice objections

2angry, but not daring to speak out (idiom); obliged to remain silent about one's resentment