丝毫不，一点也不
not in any way
She wasn't a bit worried about the test. 她丝毫不担心考试。
"Are you getting tired?" "Not a bit." “你累了吗？”“一点也不累。”
I wasn't one bit surprised at the news, to be honest.
I don't regret leaving one bit.
"You're not upset about the party, are you?" "No, not a bit - don't worry."
He's not one bit like his brother.
See also: bit noun (AMOUNT)