adjective, dead·li·er, dead·li·est.
- deadly nightshade,
- deadly sins,
Origin of deadly
Examples from the Web for deadlier
With a mortality rate of 70 percent, the more cases that arise, the deadlier this epidemic becomes.
With dozens of shootings in a weekend, the Windy City has earned another, deadlier moniker.
The tragedy in West Virginia reminds us that some careers are deadlier than others.
He was mad, crazed, intoxicated; but with a deadlier poison than was ever distilled from corn or vine!The House on the Moor, v. 3/3|Mrs. Oliphant
Going into thousands of homes every day, it is a deadlier menace than yellow fever.Carmen Ariza|Charles Francis Stocking
Borrow returned the blow, a deadlier, fiercer blow, aimed not at the face but at the heart.Res Judicat|Augustine Birrell
Greater knowledge of chemistry means industrial advancement and also deadlier poison gases.Behind the Mirrors|Clinton W. Gilbert
Again and again he rallied it splendidly, only to be hurled back each time with deadlier slaughter.Four Years in Rebel Capitals|T. C. DeLeon
adjective -lier or -liest
Old English deadlic "mortal, subject to death," also "causing death;" see dead + -ly (1). Meaning "having the capacity to kill" is from late 14c. (Old English words for this included deaðbærlic, deaðberende).