disloyalty
🇺🇸
/dɪsˈlɔɪəlti/
🇬🇧
/dɪsˈlɔɪəlti/
When someone doesn't support or betrays the ones they should be loyal to.
The employee's disloyalty to the company was evident when he shared confidential information with a competitor.
社員の会社の不忠は、競合他社と機密情報を共有したときに明らかになりました。