Pledge 504 Absolutely Essential Words Lesson 15
/pledʒ/ (noun & verb)
a serious and formal promise, vow, guarantee, word of honor, assurance, commitment, undertaking, oath – to make a formal and serious promise, take an oath, undertake, assure, swear
An oath is a public pledge that a person will perform some action or duty, generally with the promise of doing so truthfully. An oath can also be used as a way of promising oneself to support a cause or an entity.
Source: https://www.law.cornell.edu/
Antonyms: recant, disavow, renounce