动词
中文翻译：违背
同义词：
["break one's word", 'break faith', 'betray']
例句：
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1. He promised to help mewith my homework, but he went backon his word.
他答应帮我做作业，但他食言了。
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2. Shebroke her promise to herfriend and went back on herword.
她违背了她对朋友的承诺。
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3.The company has broken its promise to customersand gone back on its word.
这家公司违背了对顾客的承诺。