not at all
idiomatic phrase
Meaning
A polite way to indicate that something is not a problem, or to emphasize that something is definitely not the case.
Examples
- I asked if he was tired, and he replied, 'Not at all, I feel quite energized.'
- Thank you so much for your help today! 'Not at all, it was my pleasure.'
Synonyms: no, never, by no means, in no way