誓う

1. Origins, structure, and basic meaning

• Structure: 誓う is read as ちかう and is a verb meaning to swear or make a firm vow.
• Basic usage: Put the content before quotative と, as in 同じ失敗をしないと誓う.

2. Common pitfalls and similar expressions

• Strength of commitment
  • It conveys firm resolve rather than a casual plan or ordinary arrangement.
• A mutual vow
  • 互いに shows the athletes expressing the same commitment to one another.