What is a solemn promise or commitment often referred to as?

A solemn promise or commitment is often referred to as a pledge. A pledge carries a sense of earnestness and formality, indicating a serious intention to uphold a promise or commitment. It can be associated with various contexts, such as making a pledge to support a cause, a financial promise, or a vow of reliability in relationships. While the other options—vow, commitment, and oath—also imply a promise, a pledge specifically emphasizes the formality and seriousness of the commitment made. In many instances, a pledge is made publicly, reinforcing the weight and accountability of the promise, which sets it apart from the other terms that may have slightly different connotations or usages in various contexts.