But again, how is a child supposed to learn what is wrong with their behaviour if you nobody ever ascribes negative attributes to it?
Describe the behaviour, say it is unacceptable, and what needs to change.
What's so difficult?
Talks over others constantly - may be because the child (or adult) is selfish, or arrogant. Or they may have poor social skills, or come from a culture where this behaviour is acceptable/normal. Or have anxiety which comes out as constant talking. Or whatever.
So, say that talking over other people is not acceptable, because everyone has a right to be heard.
Is 'arrogant' - well, what is he doing that comes across as arrogant?
Maybe he is arrogant, and thinks he is better than everyone else. Or maybe he isn't, but something he is doing is interpreted by the teacher as being arrogant. Either way, he can't change until he is told what, exactly, is the problem in his behaviour.