The term 'solemnly renounce' can be summarized by the word ABJURE, which is a six-letter word meaning to formally reject or disavow a formerly held belief, promise, or oath. This term is often used in legal contexts, such as when a witness in a court of law is asked to swear an oath to tell the truth and then later abjures that oath. It is also used in religious contexts, such as when someone renounces their faith or a particular belief.