’He’s got so many little friends, he’s so popular Harry suppressed a snort with difficulty.
He took two deep breaths and said, in a voice distorted by suppressed rage, ’Very well, very well… cleared of all charges.’
Ginny suppressed a giggle.
Just like Hermione, Pansy had tears in her eyes, but these were tears of laughter; indeed, her answer was almost incoherent because she was trying to suppress her giggles.
Draco Malfoy looked as though Christmas had come a month early; Hermione, on the other hand, had turned scarlet with suppressed rage.
Harry could not suppress a grin; Professor Tofty smiled back at him encouragingly.
Harry had seen enough; laughing, he ducked down low, ran to a door he knew was concealed behind a tapestry a little way along the corridor and slipped through it to find Fred and George hiding just behind it, listening to Umbridge and Filch’s yells and quaking with suppressed mirth.
There are no more uses of "suppress" in the book.
Show samples from other sources
The dictator suppressed criticism in the press.
She struggled to suppress a smile as the little boy told of his fear of a monster under the bed.