/dɪsˈkɜːrtiəs/
dis·cour·teous
BrE /dɪsˈkɜːtiəs/
NAmE /dɪsˈkɜːrtiəs/
(formal)
having bad manners and not showing respect for other people
SYN impolite OPP courteous rudecheeky ◇ insolent ◇ disrespectful ◇ impolite ◇ impertinent ◇ discourteous
These are all words for people showing a lack of respect for other people.
rude having or showing a lack of respect for other people and their feelings：
Why are you so rude to your mother?
It’s rude to speak when you’re eating.
cheeky (BrE, informal) (especially of children) rude in an amusing or an annoying way：
You cheeky monkey!
a cheeky grin
insolent (rather formal) very rude, especially to sb who is older or more important NOTE Insolent is used especially to talk about the behaviour of children towards adults.
disrespectful (rather formal) showing a lack of respect for sb/sth：
Some people said he had been disrespectful to the President in his last speech.
impolite (rather formal) not behaving in a pleasant way that follows the rules of society：
Some people think it is impolite to ask someone’s age.
NOTE Impolite is often used in the phrases It seemed impolite and It would be impolite.
impertinent (rather formal) not showing respect for sb who is older or more important NOTE Impertinent is often used by people such as parents and teachers when they are telling children that they are angry with them for being rude.：
Don’t be impertinent!
discourteous (formal) having bad manners and not showing respect：
He didn’t wish to appear discourteous.
Patterns
rude/cheeky/disrespectful/impolite/discourteous to sb
rude/impolite/impertinent to do sth