Example: "She was madly in love"
Example: "A deadly enemy"
Example: "Venomous snakes"
Example: "The seven deadly sins"
Subject to death; mortal.
Causing death; lethal.
Aiming or willing to destroy; implacable; desperately hostile.
Example: "Deadly enemies"
Very accurate (of aiming with a bow, firearm, etc.).
Very boring.
Excellent, awesome, cool.