unfaithful

Từ điển Oxford Advanced Learner 8th

un·faith·ful [unfaithful unfaithfulness] BrE [ʌnˈfeɪθfl] NAmE [ʌnˈfeɪθfl] adjective ~ (to sb)
having sex with sb who is not your husband, wife or usual partner
•Have you ever been unfaithful to him?
Opp: ↑faithful
Derived Word: ↑unfaithfulness

Example Bank:
•She remained loyal to her unfaithful husband.

• Từ đồng nghĩa / Synonyms:
  faithless, traitorous, treasonable, treasonous