Don't let it bother you; put it out of your mind.
I don't want to continue with this conversation (usually used in frustration or anger).
It doesn't matter.
A conventional reply to an expression of gratitude.
Absolutely not; I forbid it or it is impossible.
It is not important; do not fret; used to reassure or comfort the person to whom it is said.
Do not be concerned (about someone or something, or about doing something).
Indicates a withdrawal or retractment of a previous statement.
Let alone; much less.