She exercised all her self-restraint and kept quiet.

她好不容易才忍住没说话。

《牛津词典》

The parties involved should exercise (self -) restraint and prevent the situation from getting worse.

有关各方应采取克制态度，防止事态扩大。

《新英汉大辞典》

He has, in effect, advised patience and self-restraint.

实际上，他建议要耐心、克制。

youdao

The kind of discipline and self-restraint necessary for an educated mind appears, for him, to be unequally divided among human beings.

那种受过教育者,所必备的纪律与自制，对他而言似乎是不平等地,区隔了人群。

耶鲁公开课 - 政治哲学导论课程节选

Hardly. Does it not require those qualities of self-control, discipline, and restraint necessary to achieve success here?

不！难道不需要那些特质吗,诸如自控，纪律与克制等，以求在此取得成功？

耶鲁公开课 - 政治哲学导论课程节选

To work with inner negativity requires self-awareness, discipline and self-restraint.

FORBES: Compassion: The Bedrock Of Our Capacity To Serve

He had gone to a very good college back East, and when he talked fervently about his political beliefs Vivian admired his seriousness and his self-restraint, and the prominent tendons of his forearms.

NEWYORKER: Temporary

The very word confers and bestows a kind of superior morality on the individual who has knuckled under, taken control of her often uncontrollable appetites and committed herself to a brief period of self restraint and deprivation around food.

BBC: Interactive Essay: Transcript