emphasis If you say that someone is deathly pale or deathly still, you are emphasizing that they are very pale or still, like a dead person. Bernadette turned deathly pale
emphasis If you say that there is a deathly silence or a deathly hush, you are emphasizing that it is very quiet. A deathly silence hung over the square. reminding you of death or of a dead body deathly cold/white/pale