Webster’s Revised Unabridged Dictionary · 1913
Deadly
Dead′ly (dĕd′ly̆), 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. Shak.
3. Subject to death; mortal. [Obs.]
The image of a deadly man. Wyclif (Rom. i. 23).
Deadly nightshade (Bot.), a poisonous plant; belladonna. See under Nightshade.
Dead′ly, adv. 1. In a manner resembling, or as if produced by, death. "Deadly pale." Shak.
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.] "Deadly weary." Orrery. "So deadly cunning a man." Arbuthnot.