Question

Study island what does the world disdainful mean in this sentence? The principal deemed the athletes behavior disdainful and suspended them for a week.

Answer 1

Well, I found that the word Disdainful itself means: "showing contempt or lack of respect." So I would assume that it means he wasn't being respectful.
Hope this helps you, and happy studying!
~Mistermistyeyed.

Answer 2

it means showing a lack of respect