infidelity
US
UK infidelity n: (sexual unfaithfulness, adultery) (对配偶的)
SC 不忠，通奸 bù zhōng，tōng jiān
His infidelity eventually drove his wife away.
infidelity n: (betrayal of trust)
SC 背叛 bèi pàn
TC 背叛
TC 背叛
SC 背信弃义 bèi pàn，bèi xìn qì yì
Such infidelity was completely unexpected in a board member.