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diabolical

American  
[dahy-uh-bol-i-kuhl] / ˌdaɪ əˈbɒl ɪ kəl /
Also diabolic

adjective

  1. having the qualities of a devil; devilish; fiendish; outrageously wicked.

    a diabolical plot.

  2. pertaining to or actuated by a devil.


diabolical British  
/ ˌdaɪəˈbɒlɪkəl /

adjective

  1. excruciatingly bad; outrageous

  2. (intensifier)

    a diabolical liberty

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • diabolically adverb
  • diabolicalness noun
  • hyperdiabolical adjective
  • hyperdiabolically adverb
  • hyperdiabolicalness noun
  • nondiabolical adjective
  • nondiabolically adverb
  • nondiabolicalness noun
  • superdiabolical adjective
  • superdiabolically adverb
  • superdiabolicalness noun

Etymology

Origin of diabolical

First recorded in 1500–10; from Late Latin diabolicus ( diabolic ( def. ) ) + -al 1 ( def. )

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Sellers’s “talent was diabolical,” writes Mr. Lewis, embracing the full connotations of the word.

From The Wall Street Journal

Product designers are coming up with novel ways to rouse deep sleepers that border on diabolical, including clocks that deliver 300-volt electric shocks and donate snoozers’ money to charity.

From The Wall Street Journal

Product designers are hatching new ways to rouse them that border on diabolical.

From The Wall Street Journal

In later works by Christie and others, diabolical deeds increasingly transpired in villages, hotels, trains, planes, boats and locked rooms.

From The Wall Street Journal

Later, John and Paul attempt diabolical accents while relating the story of Count Balder and Felpin Mansions, “the eccentric son of Baron Landsberg, the inventor of the rack,” including a variety of sound effects.

From Salon