disloyalty or betrayal of trust
असत्यनिष्ठा
English Usage: Her unfaithfulness caused a rift in their marriage.
Hindi Usage: उसकी असत्यनिष्ठा ने उनकी शादी में दरार डाल दी।
asatyanishta, asatya nishtha, asatya-nishtha, asatya nishthaa, asatyanishtaah, asatyanishtha, asatya nishta