Word · Frequency #8527
Fully loadedirrational
不合理的；没有道理的；荒谬的
核心释义
Not based on or using reason; illogical or absurd.
- 1.
非理性的
Not rational; unfounded, nonsensical or wrong-headed.
- 2.
无理数的
Of a real number, that cannot be written as the ratio of two integers.
- 3.
不合逻辑的
not consistent with or using reason
- 4.
不能表示为两个整数之商的实数
real but not expressible as the quotient of two integers
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
用法In use
His decision to quit his stable job without a backup plan was completely irrational.
用法提示：这里 'irrational' 作为形容词，表示不合逻辑的、不理智的行为。
The square root of 2 is an irrational number that cannot be written as a simple fraction.
用法提示：这里 'irrational' 作为形容词，用于数学术语 'irrational number'，表示不能表示为两个整数之比的实数。
She had an irrational fear of flying, even though statistics show it is very safe.
用法提示：这里 'irrational' 作为形容词，修饰恐惧，表示这种恐惧缺乏合理依据。
irrational fears
irrational animals
irrational numbers
相关词与表达Connections
搭配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
学习提示Learner notes
记忆技巧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。
语境与语域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。
发音与拼写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.
用法优先级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。
一起学习词形Learn the forms together
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Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.