tergiversation
noun /ˌtɜːdʒɪvəˈseɪʃn/
/ˌtɜːrdʒɪvərˈseɪʃn/
[uncountable, countable] (formal)- the act of making statements that deliberately hide the truth or that avoid answering a question directly
（说话）含糊其词，支吾，回避事实 - the act of removing your support from one person, group, or religion and beginning to support another
改变立场；背叛；变节