disloyal
例子
He was disloyal to his best friend by spreading rumors behind his back.
他对他的最好的朋友不忠，在背后散布谣言。
The employee was disloyal to the company by leaking confidential information to competitors.
该员工向竞争对手泄露机密信息，对公司不忠。
02
不忠的, 不爱国的
showing lack of love for your country
