起源于麻醉药发明之前的战场。当时士兵在进行手术时，会咬住一颗子弹来忍受剧痛。现在形容勇敢面对无法回避的痛苦或艰巨任务。

• I hate going to the dentist, but I’ll just have to bite the bullet. ^{我讨厌看牙医，但我只能硬着头皮去了。}
• The company had to bite the bullet and cut expenses significantly. ^{公司不得不咬紧牙关，大幅削减开支。}
• Instead of worrying about it, just bite the bullet and tell her the truth. ^{与其担心，不如横下一条心告诉她真相。}