infidelity

名词 infidelity:

1. the quality of being unfaithful
   同义词：unfaithfulness

1. She closed her eyes to her husband's infidelities.
   她丈夫有不忠行为，她却视而不见。
2. His wife has winked at his infidelity for years.
   他多年来对妻子不忠，妻子也只装作不知情。

in.fi.del.i.ty

n.（名词）
【复数】 in.fi.del.i.ties

Unfaithfulness to a sexual partner, especially a spouse.
不贞：性伙伴之间，尤指夫妻之间的不忠诚
An act of sexual unfaithfulness.
不贞的行为：性方面的不贞行为
Lack of fidelity or loyalty:
不忠实：缺乏忠心或诚意：
例句：
infidelity to the family tradition; infidelity to the principles of the revolution.
对家庭传统的背叛；背叛革命原则

Lack of religious belief.
缺乏宗教信仰