diabolic

or di·a·bol·i·cal

[ dahy-uh-bol-ik or dahy-uh-bol-i-kuh l ]
/ ˌdaɪ əˈbɒl ɪk or ˌdaɪ əˈbɒl ɪ kəl /

adjective

having the qualities of a devil; devilish; fiendish; outrageously wicked: a diabolic plot.
pertaining to or actuated by a devil.

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Origin of diabolic

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

OTHER WORDS FROM diabolic

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Example sentences from the Web for diabolic

British Dictionary definitions for diabolic

diabolic
/ (ˌdaɪəˈbɒlɪk) /

adjective

of, relating to, or proceeding from the devil; satanic
befitting a devil; extremely cruel or wicked; fiendish
very difficult or unpleasant

Derived forms of diabolic

diabolically, adverbdiabolicalness, noun

Word Origin for diabolic

C14: from Late Latin diabolicus, from Greek diabolikos, from diabolos devil
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