Word · Frequency #19868
unfaithful
不忠实的；不诚实的
not true to duty or obligation or promises
- 1.
Not having religious faith.
没有宗教信仰的。
- 2.
Not keeping good faith; disloyal; not faithful.
不守信用的；不忠的；不忠诚的。
- 3.
Adulterous.
通奸的；不忠的。
- 4.
Not honest or upright.
不诚实或不正直的。
- 5.
Negligent or imperfect.
疏忽的；不完美的。
- 6.
Not faithfully rendering the meaning of the source language; incorrect.
未忠实传达源语言含义的；不正确的。
有外遇的；不贞的；没有宗教信仰的。；不守信用的；不忠的；不忠诚的。；通奸的；不忠的。；不诚实或不正直的。
In use
She found evidence that her partner had been unfaithful with a colleague.
The spy was executed for being unfaithful to his country.
He was unfaithful to his promise to help me move house.
be unfaithful to someone
常用于指对配偶或伴侣不忠。
She was unfaithful to her husband.
她对丈夫不忠。
be unfaithful in something
用于指不履行义务或承诺。
He was unfaithful in his duties as a manager.
他在经理职责上不诚实。
Common mistakes
He unfaithful to his wife.He is unfaithful to his wife.
Connections
Collocations
- be unfaithful to someone
- 对某人不忠
- She was unfaithful to her boyfriend for months.她对她男朋友不忠有好几个月了。
- unfaithful husband
- 不忠的丈夫
- After years of suspicion, she finally left her unfaithful husband.在怀疑多年后，她终于离开了不忠的丈夫。
- unfaithful to the original
- 不忠实于原文的
- The translator's version is unfaithful to the original in several passages.译者的版本在几处段落中不忠实于原文。
- unfaithful translation
- 不忠于原文的译文
- An unfaithful translation may mislead readers about the author's intention.不忠实的译文可能会误导读者理解作者的意图。
Pop culture & quotes
- I don't wanna be unfaithful, but it's hard to be true when you're not here.
Learner notes
Memory Tip
un-（不）+ faithful（忠诚的）＝不忠诚的；记住：对伴侣或承诺失去faith（信任）就是unfaithful。
Context & Register
语域：neutral 常见场景：in a marriage or relationship、in formal or serious writing、when discussing loyalty or betrayal 该词通常用于正式或严肃的场合，多指婚姻或恋爱关系中的不忠，也可泛指不忠诚、背信弃义。日常口语中较少使用，比较常见于书面语、新闻报道或法律语境。
Pronunciation & Spelling
发音对照：unfaithful /ʌnˈfeɪθfəl/ 与 faithful /ˈfeɪθfəl/ 完全押韵（重读元音 /eɪ/ 及之后的 /θfəl/ 相同）；wasteful /ˈweɪstfəl/ 和 graceful /ˈɡreɪsfəl/ 虽有相同的重读元音 /eɪ/，但 /stf/、/sf/ 与 /θf/ 不同，不押韵；untruthful /ʌnˈtruːθfəl/ 拼写结构与 unfaithful 相似（un- + … + -ful），但重读元音是 /uː/，不押韵；useful /ˈjuːsfəl/ 和 helpful /ˈhelpfəl/ 只共享非重读后缀 -ful /fəl/，也不押韵。
Usage priority
Collins 词频等级为 1，建议结合例句记忆，而不是只背中文释义。
Dictionary facts from ECDICT, WIKTIONARY.