the action or state of being unfaithful to a spouse or other sexual partner
(对配偶或性伙伴的)不忠行为;不忠
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her infidelity continued after her marriage 她婚后仍有不忠行为
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[count noun]
I ought not to have tolerated his infidelities .我当初不应容忍他的不忠行为。
disbelief in a particular religion, especially Christianity
不信奉宗教(尤指基督教)。
"late Middle English (in the senses ‘lack of faith' and ‘disloyalty’): from Old French