After a moment, "I mean no discourtesy," he began stiffly, "but—"
I write without her knowledge, and I hope that you will not associate her with my discourtesy.
It was a climax of discourtesy whose impression I must at all costs efface.
At first this sort of thing seems to us to spring from laziness or from discourtesy.
Courtesy, they say, is the mark of a great man, discourtesy ...