unfaithful
/ˌʌnˈfeɪθfʊl/adjective
1- not faithful, in particular不诚实的; 不忠的：尤指
1.1
- engaging in sexual relations with a person other than one's regular partner in contravention of a previous promise or understanding不信守婚誓的; 通奸的：
you haven't been unfaithful to him, have you?
你没有对他不忠, 对吗？
her unfaithful husband.
她有婚外恋的丈夫。
1.2
- disloyal, treacherous, or insincere不忠实的; 不守信的; 不诚实的：
she felt that to sell the house would be unfaithful to her parent's memory.
她觉得卖房子是对已故父母的不忠。
派生词