Killingly

Origin

killing + -ly

Full definition of killingly

Adverb

1. In a killing manner.
• 1916 William Dean Howells: Between the Dark and the Daylight (page 152) http://www.google.com/books?spell=1&q=%22I+should+not+be+able+to+say+how+killingly+droll+I+found+this%22&btnG=Search+BooksI should not be able to say how killingly droll I found this.