deadly
dead·ly
adj \ˈded-lē\dead·li·er; dead·li·est
Definition of DEADLY
: likely to cause or capable of causing death <a deadly disease> <a deadly poison> <a deadly instrument>
—dead·li·ness \-nəs\ (audio pronunciation) noun
Learn More About
Seen & Heard 
What made you want to look up deadly? Please tell us where you read or heard it (including the quote, if possible).
