忍气吞声

忍氣吞聲
rěnqìtūnshēng
  1. to submit to humiliation (idiom); to suffer in silence
  2. to swallow one's anger
  3. to grin and bear it

CEDICT

to silently eat humble pie; to suppress anger and quietly bear humiliation

Wiktionary

受了气也强自忍耐，不敢作声抗争。《金瓶梅．第四一回》：「李瓶儿这边分明听见指骂的是他，把两隻手气的冷，忍气吞声，敢怒而不敢言。」《初刻拍桉惊奇．卷一五》：「卫朝奉只是着人上门坐守，甚至恶语相加，陈秀才忍气吞声。」也作「吞声忍气」、「吞声饮气」、「气忍声吞」、「声吞气忍」。

重編國語辭典

Entry Composition

1 忍气 rěnqì
  1. to hold one's breath
  2. to swallow one's anger; to submit to humiliation
2 吞声 tūnshēng to swallow one's cries