1
not a/one iota of + uncountable noun
常用于否定句，强调完全不存在。
There is not an iota of evidence to support his claim.
他的说法没有丝毫证据支持。
约塔；伊奥塔
先理解核心含义，再看它在真实句子里的用法。
约塔；伊奥塔
the ninth letter of the Greek alphabet
There is not an iota of evidence to support his claim.
他的说法没有丝毫证据支持。
只指希腊字母第9个字母；‘极微小’义不在本条。
希腊字母表的第九个字母(Ι, ι)。
The ninth letter of the Greek alphabet (Ι, ι).
一种银行账户,赚取利息并支付给第三方,通常是慈善机构；本金通常由账户持有人托管
A bank account that earns interest and pays it to a third party, generally a charity; the principal is typically being held in escrow by the accountholder.
拉丁字母Ɩ(小写:ɩ)。
The Latin letter Ɩ (minuscule: ɩ).
一点；极小且无关紧要的数量。
A jot; a very small, insignificant quantity.
There isn't an iota of truth in his excuse.
他的借口里没有一丝一毫的真话。
She didn't show even an iota of interest in my proposal.
她对我的建议没有表现出哪怕一丁点的兴趣。
After the argument, their friendship did not change one iota.
那场争吵之后，他们的友谊一点也没有改变。
常用于否定句，强调完全不存在。
There is not an iota of evidence to support his claim.
他的说法没有丝毫证据支持。
用作副词短语，修饰动词，强调程度为零。
Her decision did not change one iota despite our pleas.
尽管我们恳求，她的决定没有丝毫改变。
较不常见，用于肯定句，强调全部。
He absorbed every iota of knowledge from the lecture.
他吸收了讲座的每一丝知识。
Not this
He has an iota of courage.
Use this
He does not have an iota of courage.
iota 几乎只用于否定句中，表示‘一点也没有’，在肯定句中使用显得不自然。
Not this
I don't have iota of doubt.
Use this
I don't have an iota of doubt.
iota 是可数名词，在否定结构中需要冠词 'an'，缺少冠词是不合语法的。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
丝毫不，一点也不
I don't care one iota about the critics.
我对那些批评者一点也不在乎。
一丝实情，一点儿真实性
There is not an iota of truth in the rumor.
那个谣言没有一点真实性。
没有丝毫证据
They produced not an iota of evidence to support the claim.
他们没有拿出丝毫证据来支持这一说法。
丝毫差异
It makes not an iota of difference which option you choose.
你选择哪个选项没有丝毫差别。
毫不迟疑地
She agreed without an iota of hesitation.
她毫不迟疑地同意了。
一点也不；丝毫
His apology didn't change my opinion one iota.
他的道歉丝毫没有改变我的看法。
一点……都没有；丝毫……也没有
There is not an iota of truth in his story.
他的说法里没有一丝一毫的真实性。
丝毫；一点
It doesn't matter one iota what they think.
他们怎么想丝毫都不重要。
我实在告诉你们，就是到天地都废去了，律法的一点一画也不能废去，都要成全。
This is from the Bible, Matthew 5:18 (ESV), in the Sermon on the Mount. It uses 'iota', the smallest Greek letter, to stress that even the tiniest detail of the law must be fulfilled.
这句话出自圣经《马太福音》5章18节（ESV版），是登山宝训中的内容。它用希腊字母中最小的‘iota’来强调，即使律法中最微小的细节也必被成全。
Use iota naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
希腊字母 ι 就一小竖，像'一点点'；由此记住 iota = 极小、毫不重要的数量。
语域：formal 常见场景：formal writing、speeches and journalism、negative constructions like 'not one iota' iota 表示“极小量”时多用于较正式的书面语或修辞性表达，常见于否定句（如 not one iota）；日常口语中更常说 a bit 或 a shred。
与 iota 韵脚一致的是 quota（/ˈkwoʊtə/ 与 /aɪˈoʊtə/ 同韵 /oʊtə/）。beta（/ˈbeɪtə/）和 theta（/ˈθeɪtə/）只共享拼写结尾 -ta，发音不同，不押韵。
Dictionary facts from ECDICT, WIKTIONARY.