to back out
这件事原是他亲口答应的，如今却翻悔不认账了。
He was the one who made the promise in the first place and now he's trying to back out.
汉译英翻译词典收录86165条汉英翻译词条，基本涵盖了全部常用中文字词的英语拼写、翻译、音标、读音、用法、例句等，是英语学习的有利工具。