voice → vow、avow、disavow

voice v. 发声
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vow [vaʊ] v. 发誓
注：与voice同源同根，本义“发声”
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avow [əˈvaʊ] v. 承认，声明
例：He avowed that he regretted what he had done. 他承认对自己的所作所为感到后悔。（剑桥词典）
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