discourteousdis‧cour‧te‧ous /dɪsˈkɜːtiəs $ -ɜːr-/ adjective formal 
Examples
It would be discourteous to ignore his request.► see thesaurus at rude—discourteously adverb
ExamplesEXAMPLES FROM OTHER DICTIONARIES
Thesaurus- He claimed that the officer had been discourteous to him.
- It would have seemed discourteous to refuse his offer.
- The sales staff were discourteous and slow.
- All this, discourteous though it was, seemed normal enough.
- Female respondents also complained that men drive too fast and are often very discourteous to others.
- He was fascinated by Laura's stories of psychoanalysis and his overenthusiastic questions almost verged on the discourteous.
- I have allowed several interruptions and, although I do not wish to be discourteous, I should get on.
- It would have been enormously discourteous.
THESAURUS► rude
not polite, and not showing respect for other people SYN rude, impolite: not following the rules of good social behaviour or treating other people with a lack of respect: · It’s rude to interrupt.· He’s the rudest man I’ve ever met.· rude remarks about her stomach
► impolite/not polite not following the rules of good social behaviour. Impolite sounds rather formal: · It is impolite to stare.· It’s not polite to talk with your mouth full of food.
► cheeky British English, smart/sassy American English behaving in a way that is a little rude, especially when this is amusing or annoying – used especially about children: · a cheeky grin· Let go, you cheeky monkey (=cheeky child)!· Don’t get smart with me!
► tactless saying things that are likely to upset or embarrass someone, without intending to: · a tactless remark· How could you be so tactless?
► offensive speaking or behaving in a way that is likely to upset or offend someone: · His remarks are offensive to African-Americans.· offensive language
► insulting speaking or behaving in a way that is very rude and offensive to someone: · comments that are insulting to women· The article was full of insulting language.
► discourteous formal rather rude. Discourteous sounds very formal and is often used when talking about being careful not to upset someone’s feelings: · He did not wish to appear discourteous towards his host.· It would seem discourteous to refuse her offer.
► ill-mannered (also bad-mannered) especially written behaving in a rude way, especially because you have never been taught how to behave politely: · Ill-mannered movie-goers talked throughout the entire picture.· It was very bad-mannered.
► disrespectful not showing the proper respect for someone or something: · I felt her comments were disrespectful to all the people who have worked so hard on this project.
► impertinent formal not showing a proper respect for someone, especially by asking or talking about subjects that you do not have a right to know about: · an impertinent question about his private life· an impertinent young man· Would it be impertinent to ask how old you are?
► insolent formal behaving in a way that is deliberately very rude to someone in authority: · The girl’s only response was an insolent stare.· Don’t be so insolent!
► impudent formal rude, and having no respect for people who are older or more important: · The boy gave an impudent smile.
► irreverent showing a lack of respect for someone or something who people are supposed to respect – used especially about comedy programmes and newspaper articles: · an irreverent look at the week’s events· his irreverent sense of humour
Longman Language Activatorrude/not polite► rude someone who is rude upsets or offends people by not following the rules of good social behaviour and not considering other people's feelings: · What a rude man! He just ignored me when I said "Good morning".· I don't mean to be rude, but could you tell your children to keep quiet?· He's one of the rudest people I've ever met.rude to: · I know you're upset, but there's no need to be rude to your mother.rude about: · Are you being rude about my cooking?it is rude to do something: · It's rude to interrupt people when they are speaking.it is rude of somebody to do something: · I thought it was very rude of her not to answer my letter.
► impolite/not polite not following the rules of accepted social behaviour, especially when someone does this without realizing it - use this especially about the things that people do or say, rather than about people themselves: · In Senegal it is considered impolite if you do not share your food.· You weren't very polite to her.it is impolite/not polite to do something: · I was tired, but I thought it might not be polite to leave so early.· It is impolite and inconsiderate for people to drop in uninvited.
► tactless someone who is tactless upsets or embarrasses someone else, without intending to, by mentioning something that it would be better not to talk about: · I wanted to know about her divorce, but I thought it would be tactless to ask.· She was often tactless and insensitive.· tactless remarks
► abrasive seeming rude or unkind because you say what you think very directly, so that people are annoyed or offended: · Harris was abrasive and arrogant.· Anson's abrasive personality has landed her in trouble many times in the past.
► bad manners someone who has bad manners does not behave politely in social situations, for example by not saying "please" and "thank you": · Marilyn apologized for her husband's bad manners.it is bad manners to do something: · It is bad manners to talk with your mouth full.
► bad-mannered/ill-mannered behaving in a rude and unpleasant way, especially because of never having been taught how to be polite: · Her children are incredibly bad-mannered -- she should be more strict with them.· Ill-mannered movie-goers talked and took cell phone calls during the picture. · As soon as some English people go abroad, they seem to change into bad-mannered, insensitive oafs.
► discourteous formal not behaving in a polite way - use this especially about people's remarks or behaviour: · It would have seemed discourteous to refuse his offer.discourteous to: · He claimed that the officer had been discourteous to him.
► be unpleasant to deliberately behave in a rude and unfriendly way towards someone: · He can be very unpleasant when he's in a bad mood.· It isn't necessary to be that unpleasant, Mike.be unpleasant to: · She was shocked at how unpleasant the children were to their mother.
► loutish rude, loud, and unpleasant - use this especially about people's behaviour: · The behaviour of some politicians in debates is simply loutish and intimidating.· They considered my boyfriend to be loutish and a bit stupid.· loutish behaviour
It would be discourteous to ignore his request.► see thesaurus at rude—discourteously adverb