infidelity [infidelities] (unfaithfulness in marriage or other moral obligation) noun [UK: ˌɪn.fɪ.ˈde.lɪ.ti] [US: ˌɪn.fə.ˈde.lə.ti]
infidelidadnoun {f}She never forgave him the infidelity and held it over him every chance that she got. = Ella nunca perdonó su infidelidad y se lo recordó en cada oportunidad.