deadly
(rare) Subject to death; mortal.
Causing death; lethal.
Aiming or willing to destroy; implacable; desperately hostile.
Very accurate (of aiming with a bow, firearm, etc.).
(informal) Very boring.
(Newfoundland) Excellent, awesome, cool.
(obsolete) Fatally, mortally.
In a way which suggests death.
Extremely, incredibly.
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