Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


Japanese translation of “unfaithful”


adjective   /ʌnˈfeɪθ·fəl/
having sex with someone who is not your wife , husband , or usual sexual partner
She was unfaithful to me.
(Definition of unfaithful adjective from the Cambridge English-Japanese Dictionary © Cambridge University Press)

Definitions of “unfaithful” in other dictionaries

Word of the Day


a skilled and trained cook who works in a hotel or restaurant, especially the most important cook

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More