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.
To repeat part of or entire message transmitted over the radio, used instead of "repeat" which is an artillery procedure word.
"What did you say?" or "Repeat what you have said." A polite formula used when one has not heard or understood what has been said.