’Well, there are two fifth-year prefects from each house,’ said Hermione, looking thoroughly disgruntled as she took her seat.
Professor Trelawney nodded curtly and, looking very disgruntled, turned her back on Professor Umbridge and continued to give out books.
’We’re not doing anything new?’ said Zacharias Smith, in a disgruntled whisper loud enough to carry through the room.
Ron said nothing, but looked disgruntled.
’I’m not saying what she did was sensible,’ said Hermione, as Ginny joined them, just as muddy as Ron and looking equally disgruntled.
She led her sodden and disgruntled team back into the changing rooms, insisting that the practice had not been a waste of time, though without any real conviction in her voice.
There are no more uses of "disgruntled" in the book.
Show samples from other sources
The employees were disgruntled by their bad working conditions
But I’m disgruntled because six women have been here to say good-bye to me, and every one of the six managed to say something that seemed to take the color right out of life and leave it as gray and dismal and cheerless as a November morning.