iota

柯林斯词典

1. QUANT If you say that there is not an iota or not one iota of something, you are emphasizing that there is not even a very small amount of it. 一点儿; 极小的量[with brd-neg, QUANT 'of' n-uncount] [强调]
He's never shown an iota of interest in any kind of work. 他对任何一种工作都没有表现出一点儿兴趣。
2. PHRASE You can use an iota or one iota to emphasize a negative statement. Not an iota or not one iota means not even to a small extent or degree. 丝毫的[with brd-neg, PHR after v] [强调]
Our credit standards haven't changed one iota. 我们的信贷标准从未有丝毫改变。