deadly /(?)/

dead·ly

deadly

a.
  1. Capable of causing death; mortal; fatal; destructive; certain or likely to cause death; as, a deadly blow or wound.
  2. Aiming or willing to destroy; implacable; desperately hostile; flagitious; as, deadly enemies.
    Thy assailant is quick, skillful, and deadly.
  3. Subject to death; mortal. [Obs.]
    The image of a deadly man.
    — Wyclif (Rom. i. 23).

Phrases & Compounds
Deadly nightshade
a poisonous plant; belladonna. See under Nightshade.

deadly

adv.
  1. In a manner resembling, or as if produced by, death; deathly.
  2. In a manner to occasion death; mortally.
    The groanings of a deadly wounded man.
    — Ezek. xxx. 24.
  3. In an implacable manner; destructively.
  4. Extremely. [Obs.]