adjective
1.
suggesting death (as in inertness or appearance)
fell in a deathly faint
Synonyms: corpselike, corpsy, dead, deadened, deadly, deathful, deathlike
Related Word: cadaverous, haggard, wasted; ghastly, grisly, gruesome, macabre; appalling, dreadful, horrible
Contrasted words: healthy, hearty, robust; stout, sturdy; energetic, strenuous, vigorous
2.
Synonyms: deadly 1, fatal, lethal, mortal, mortiferous, pestilent, pestilential