noun (plural -ties) Date: 15th century lack of belief in a religion, 2. unfaithfulness to a moral obligation ; disloyalty , marital unfaithfulness or an instance of it
INFIDELITY
Meaning of INFIDELITY in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012