Antonym: courtesy. Similar words: discourteous, courtesy, discourse, discount, discourage, discouraged, discouragement, courteous. Meaning: [-tɪsɪ] 
n. 1. an expression of lack of respect 2. a manner that is rude and insulting 3. a lack of politeness; a failure to show regard for others; wounding the feelings or others.
n. 1. an expression of lack of respect 2. a manner that is rude and insulting 3. a lack of politeness; a failure to show regard for others; wounding the feelings or others. 
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1. I must apologize for my discourtesy in arriving late.
2. I was amazed by their discourtesy and lack of professionalism.
3. It was accounted great discourtesy to put any question to a guest before his wants had been satisfied.
3. Sentencedict.com is a online sentence dictionary, on which you can find nice sentences for a large number of words.
4. This discourtesy did not escape the notice of the press.
5. Examples might include complaints about excessive delay, errors, discourtesy or the way in which the Revenue has exercised discretion.
6. She felt she had committed a discourtesy.
7. He was insensitive to all kinds of discourtesy.
8. He apologised for his discourtesy but denied using the F-word or calling the policemen "plebs".
9. The customer complained to the manager of the discourtesy of an assistant.
10. It is the first time for me to see this kind of discourtesy.
11. If you don't agree that the lack of at least a README is a fundamental discourtesy, that's fine--we can disagree on that point.
12. During the National Civic Virtues Month, all the cities should and banish disarray and discourtesy.
13. During the National Civil Virtues Month, all the cities must and banish disarray and discourtesy.
More similar words: discourteous, courtesy, discourse, discount, discourage, discouraged, discouragement, courteous, viscous, discord, discomfort, discolor, discovery, discontent, discovered, discordant, discontinue, discomposure, disconcerting, discontinuance, discontentment, court, courtroom, descartes, supreme court, scourge, scoundrel, misconceive, disc, dishearten.