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Use "discourteousness" in a sentence
"Ask yourself this question, can you even imagine that kind of mannerless, undiplomatic, insulting discourteousness from Barack Obama?"
"Their "right" to smoke is, at the least, the height of discourteousness."
"The commission found that Rumboll's administration and management was characterised by bullying, non-consultation, discourteousness, harassment and intimidation of staff and colleagues."