不用客氣

you're welcome / don't mention it / no need to stand on ceremony

no; not so / (bound form) not; un-

need not

to use / to employ / to have to / to eat or drink / expense or outlay / usefulness / hence / therefore

customer / visitor / guest

polite / courteous / formal / modest

gas / air / smell / weather / to make angry / to annoy / to get angry / vital energy / qi

gas; air / smell / weather / to make angry; to annoy; to get angry / vital energy; qi