Word · Frequency #8527
Fully loadedirrational
不合理的；没有道理的；荒谬的
Not based on or using reason; illogical or absurd.
- 1.
Not rational; unfounded, nonsensical or wrong-headed.
非理性的
- 2.
Of a real number, that cannot be written as the ratio of two integers.
无理数的
- 3.
not consistent with or using reason
不合逻辑的
- 4.
real but not expressible as the quotient of two integers
不能表示为两个整数之商的实数
无理数的；不能表示为两个整数之比的；非理性的；无理数的；不合逻辑的；不能表示为两个整数之商的实数
In use
His decision to quit his stable job without a backup plan was completely irrational.
The square root of 2 is an irrational number that cannot be written as a simple fraction.
She had an irrational fear of flying, even though statistics show it is very safe.
irrational fears
irrational animals
irrational numbers
irrational + noun
表示不合理的性质，常用于修饰恐惧、行为等名词。
He has an irrational fear of spiders.
他对蜘蛛有一种无理性的恐惧。
be irrational
Connections
Collocations
- irrational behavior
- 不合理的行为
- His irrational behavior puzzled everyone.他的不合理行为让每个人困惑。
- irrational fear
- 非理性的恐惧
- She has an irrational fear of spiders.她对蜘蛛有一种非理性的恐惧。
- irrational decision
- 不理智的决定
- Making an irrational decision can lead to regret.做出不理智的决定可能导致后悔。
- irrational number
- 无理数
- Pi is an irrational number.π是一个无理数。
- irrational thought
- 非理性的想法
- He tried to rid his mind of irrational thoughts.他试图摆脱非理性的想法。
- irrational exuberance
Learner notes
Memory Tip
ir-（不）+ rational（理性/有理数），所以irrational=不合逻辑的；数学中指不能表示为整数比的实数，如π。
Context & Register
语域：formal 常见场景：mathematics、number theory 此处的“irrational”指“不能表示为整数之商的实数”，属于数学领域的专业术语，通常用于正式学术语境。
Pronunciation & Spelling
These words share the ending /ʃənəl/ (or /ʃənl/) and rhyme with 'irrational' in their final syllables. Note that 'irrational' is spelled with double 'r', but the sound matches. Words like 'national' have stress on the first syllable, while 'irrational' stresses the second.
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。
Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.