Definition of diabolical in English:

diabolical

Syllabification: di·a·bol·i·cal
Pronunciation: /ˌdīəˈbälikəl
 
/
(also diabolic)

adjective

Derivatives

diabolically

Pronunciation: /-ik(ə)lē/
adverb
[as submodifier]: I am going to get diabolically drunk
More example sentences
  • Unless, of course, you think the Bay of Bigs fiasco was actually a diabolically clever criminal conspiracy to make JFK look bad.
  • And to think we almost walked right into that diabolically clever trap!
  • Social Security is a diabolically inadequate program: if you die, the ‘contributions’ you've made to the system are forfeited, and your heirs are out of luck.

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