unfaithful
🇺🇸
/ʌnˈfeɪθfl/
🇬🇧
/ʌnˈfeɪθfl/
adjective
R
not loyal or true to a spouse or partner, especially in marriage
He was unfaithful to his wife and had a secret relationship with another woman.
彼は妻に不貞であり、別の女性と秘密の関係を持っていました。
translation
不誠実な