di·a·bol·ic

[dahy-uh-bol-ik]
adjective
1.
having the qualities of a devil; devilish; fiendish; outrageously wicked: a diabolic plot.
2.
pertaining to or actuated by a devil.
Also, di·a·bol·i·cal.


Origin:
1350–1400; Middle English diabolik (< Middle French) < Late Latin diabolicus < Greek diabolikós, equivalent to diábol(os) devil + -ikos -ic

di·a·bol·i·cal·ly, adverb
di·a·bol·i·cal·ness, noun
hy·per·di·a·bol·i·cal, adjective
hy·per·di·a·bol·i·cal·ly, adverb
hy·per·di·a·bol·i·cal·ness, noun
non·di·a·bol·ic, adjective
non·di·a·bol·i·cal, adjective
non·di·a·bol·i·cal·ly, adverb
non·di·a·bol·i·cal·ness, noun
su·per·di·a·bol·i·cal, adjective
su·per·di·a·bol·i·cal·ly, adverb
su·per·di·a·bol·i·cal·ness, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To diabolical
00:10
Diabolical is always a great word to know.
So is gobo. Does it mean:
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
Collins
World English Dictionary
diabolic (ˌdaɪəˈbɒlɪk) [Click for IPA pronunciation guide]
 
adj
1.  of, relating to, or proceeding from the devil; satanic
2.  befitting a devil; extremely cruel or wicked; fiendish
3.  very difficult or unpleasant
 
[C14: from Late Latin diabolicus, from Greek diabolikos, from diabolosdevil]
 
dia'bolically
 
adv
 
dia'bolicalness
 
n

diabolical (ˌdaɪəˈbɒlɪkəl) [Click for IPA pronunciation guide]
 
adj
1.  excruciatingly bad; outrageous
2.  (intensifier): a diabolical liberty
 
dia'bolically
 
adv
 
dia'bolicalness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Etymonline
Word Origin & History

diabolic
late 14c., from O.Fr. diabolique (13c.), from L.L. diabolicus, from Gk. diabolikos "devilish," from diabolos (see devil).

diabolical
c.1500, "pertaining to the devil," from diabolic (late 14c.) , from Fr. diabolique (see diabolic) + -al (1). Meaning "befitting the devil" is from 1540s. Related: Diabolically.
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
Example sentences
He also has an even more diabolical plan waiting in the wings.
Quite clearly, by the end of the war, one knew what a diabolical fiend he was.
They don't take part in the abominable, diabolical war.
Too good to be intimidated by a diabolical golf course that frustrated many of
  his opponents.
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