Deadest

adjective

1. No longer living.

   "All of my grandparents are dead."

2. Figuratively, not alive; lacking life.
3. (of another person) So hated that they are absolutely ignored.

   "He is dead to me."

4. Doomed; marked for death (literally or as a hyperbole).

   ""You come back here this instant! Oh, you're dead, mister!""

5. Without emotion.

   "She stood with dead face and limp arms, unresponsive to my plea."