1.reverently
2.earsplitting
The audience had been listening to the pianist's playing the religious music reverently until a sudden earsplitting explosion stopped him.
Summary:
Dobby warned that Harry would be in the mortal danger if he went back to Hogwards. Someone was making a plot to kill Harry, even the greatest headmaster, Dumbledore, couldn't protect him. Harry wanted to know who the person was, but Dobby feared to tell him.