iota

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not an iota

Not a single, tiny bit; not at all. A: "Are you nervous at all about tonight's fight?" B: "Not an iota. This is what I've been training for." I don't get an iota of gratitude from my children for everything you do to keep them happy and healthy.
See also: iota, not

not one iota

Not a single, tiny bit; not at all. A: "Are you nervous at all about tonight's fight?" B: "Not one iota. This is what I've been training for." I don't get one iota of gratitude from my children for everything you do to keep them happy and healthy.
See also: iota, not, one

not one iota

not even a tiny bit. I won't give you any at all! Not one iota! I did not get one iota of encouragement from any of those people.
See also: iota, not, one

not one iota

Not even the smallest amount, as in He got not one iota of thanks for his efforts. This usage appeared in slightly different form in the New Testament (Matthew 5:18): "One jot [iota] ... shall in no wise pass from the law till all be fulfilled." (The noun jot comes from the Greek iota.)
See also: iota, not, one