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fiendish +‎ -ly


fiendishly (comparative more fiendishly, superlative most fiendishly)

  1. In a fiendish manner
    • 1929, Robert E. Howard, Skull-Face Chapter 8
      The terrible spectacle drove for the instant all thought of rebellion from my mind. My very blood froze in my veins and I stood motionless. I heard Hassim laugh grimly behind me. The eyes in the cadaverous face blazed fiendishly at me and I blanched from the concentrated satanic fury in them.
    • 1846, Eliza Roxcy, Biography and family record of Lorenzo Snow
      I was suddenly awakened by a savage looking fellow standing close to my bedside, ordering me and my companion to leave our bed forthwith or suffer the consequences; at the same time using the most blasphemous language, and uttering the most hideous oaths imaginable, while fiendishly striking his huge fists in close proximity to my face.
  2. Extremely
    • 2010, Jeremy Duns, Free Agent, ISBN 1849830886, page 78:
      Either the Russians are so fiendishly clever that they've managed to keep one of their agents running in this organization for over twenty years or they're so fiendishly clever that they're sending us false defectors to claim that they have.
    • 2015, Samer Nashef, The Naked Surgeon: the power and peril of transparency in medicine, ISBN 1925113809:
      In this operation, veins or arteries are taken from various body parts and used to bypass blockages or narrowings in the coronary arteries, those fine, fiddly, yet fiendishly important vital suppliers to the heart muscle itself.
    • 2017 October 27, Alex McLevy, “Making a killing: The brief life and bloody death of the post-Scream slasher revival”, in The Onion AV Club[1]:
      Balancing horror and comedy is fiendishly difficult. The two rarely work well together, which is why the successes become so lauded (Evil Dead 2, An American Werewolf In London, Dead Alive).