| 词汇 | infidelity |
| 词根词缀 | 词源： 1509, "want of faith, unbelief in religion," from L. infidelitas "unfaithfulness," noun of quality from infidelis (see infidel). Meaning "unfaithfulness or disloyalty to a person" is from 1529, originally to a sovereign, later 16c. to a lover or spouse. |
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