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commit infidelity
She accused her husband of committing infidelity.
她指责丈夫不忠。
（在婚姻或恋爱中的）不忠；出轨
先理解核心含义，再看它在真实句子里的用法。
（在婚姻或恋爱中的）不忠；出轨
Unfaithfulness in a marriage or intimate relationship, especially having a sexual or romantic affair with someone other than one's partner.
She accused her husband of committing infidelity.
她指责丈夫不忠。
在婚姻或亲密关系中的不忠:未经配偶同意与他人发生性关系或爱情关系的行为或事例。
Unfaithfulness in a marriage or an intimate (sexual or romantic) relationship: practice or instance of having a sexual or romantic affair with someone other than one's spouse, without the consent of the spouse.
不忠诚的特质
the quality of being unfaithful
其他道德义务方面的不忠。
Unfaithfulness in some other moral obligation.
She discovered her husband's infidelity after finding a receipt for a hotel room.
她在发现一张酒店房间的收据后，得知了丈夫的不忠。
Infidelity among close friends can destroy a lifelong bond of trust.
亲密朋友间的背信会摧毁终身建立的信任纽带。
The company's infidelity to its core values led to a public scandal.
该公司对其核心价值观的背信行为导致了公开丑闻。
She accused her husband of committing infidelity.
她指责丈夫不忠。
常用搭配：in a marriage / relationship
Infidelity in a marriage can be devastating.
婚姻中的不忠可能是毁灭性的。
He was accused of infidelity by his partner.
他的伴侣指责他不忠。
Not this
He is infidelity to his wife.
Use this
He is unfaithful to his wife.
将名词'infidelity'误用作形容词，应使用形容词'unfaithful'或短语'committed infidelity'。
Not this
She accused him of infidelity of his wife.
Use this
She accused him of infidelity to his wife.
表示'对...不忠'时，介词应用'to'而非'of'。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
婚姻不忠；婚内出轨
The movie explores the consequences of marital infidelity.
这部电影探讨了婚内出轨的后果。
性不忠；肉体出轨
They agreed that sexual infidelity would end their marriage.
他们一致认为肉体出轨会结束他们的婚姻。
精神出轨；情感不忠
He considered his wife's texting an old friend to be emotional infidelity.
他认为妻子与老朋友发短信属于精神出轨。
不忠行为；一次出轨
Forgiveness is difficult after an act of infidelity.
发生一次不忠行为之后，原谅是很难的。
怀疑有外遇；怀疑不忠
He began to suspect infidelity when his wife stayed late at work every night.
当妻子每晚都很晚下班时，他开始怀疑她不忠。
承认出轨；坦白不忠
After years of guilt, he finally confessed his infidelity to her.
在多年内疚之后，他终于向她坦白了自己的出轨。
彻头彻尾的不忠，放起你的唱片，然后为我后悔吧。
Lyrics from Taylor Swift's 2022 song 'High Infidelity' (from the album Midnights). The phrase plays on 'high fidelity' and refers to a relationship betrayal, telling the ex to listen to old records and regret the loss.
出自泰勒·斯威夫特2022年专辑《Midnights》中的歌曲《High Infidelity》。这句歌词玩味了“高保真”一词，用来指代感情中的背叛，让前任放起旧唱片，为失去她而后悔。
Use infidelity naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把 in- 想成“不”，fidelity 想成“忠诚”，合起来就是“不忠诚、出轨”，记住对伴侣的背叛。
语域：neutral 常见场景：news reports、formal writing、legal discussions infidelity 是比较正式的中性用词，多用于书面语、新闻报道或正式讨论；日常口语中更常说 cheating。请根据场合选择用词。
可数时指具体不忠行为；常与to或in搭配。
Dictionary facts from ECDICT, WIKTIONARY.