Rude as in being mean or so.
EX: He was so rude, by talking very loudly at the wedding.
that boy is very rude
He did not think before he spoke, and he sounded very rude.
Example sentence - Her rude behavior continues to be a puzzlement to all.
It is extremely rude and wrong to destroy an animal's habitat.
"I think you should admonish him for being rude during the meeting."
One way to use "guilty" in a sentence is: "He felt guilty for forgetting his friend's birthday."
The use of the word in the sentence you quote is in the sense of having been perceived as being rude to an elder. So yes, the sentence is correct.
She was truculent and rude.
I was actually going to go this way, because I have a life and don't like you. whoever wrote that sentence is rude rude rude!
there is no need to be rude we are all friends here
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I was offended by the man's rude remarks and gestures.