She was deathly pale, and looked as if she might faint.deathlydeath‧ly /ˈdeθli/ adjective, adverb 
She was deathly pale, and looked as if she might faint.a deathly hush/silence (=complete silence) A deathly hush fell over the room.
COLLOCATIONS FROM THE ENTRY She was deathly pale, and looked as if she might faint. Sharon went deathly pale and looked as if she might faint.COLLOCATIONS FROM THE CORPUSNOUN
She was deathly pale, and looked as if she might faint. (=complete silence) A deathly hush fell over the room.
COLLOCATIONS FROM OTHER ENTRIES A deathly hush fell over the room. Sharon went deathly pale and looked as if she might faint.· A deathly hush fell, in which the sound of some one talking too loudly behind the main stand could clearly be heard.· There was a deathly hush over the whole show.· A deathly hush envelops the scene, a silence that seems almost sinister.
WORD FAMILYnoundeaddeathdeadlinessadjectivedeaddeadlydeathlyadverbdeadlydeathlyverbdeaden
reminding you of death or of a dead bodydeathly cold/white/pale She was deathly pale, and looked as if she might faint.a deathly hush/silence (=complete silence) A deathly hush fell over the room.