C1 noun /ʌnˈfeɪθfʊlnəs/
unfaithfulness
विश्वासघात
Meaning
the quality of being disloyal or not faithful; breach of trust or fidelity
Example
His unfaithfulness led to the end of their marriage.
उसका विश्वासघात उनकी शादी का अंत कर गया।