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Comparative
more diabolical
Superlative
most diabolical
1
tremendously wicked or evil, just like the Devil
- The villain’s diabolical plan aimed to cause chaos and suffering.
- The diabolical nature of the crime shocked the entire community.
- The movie’s antagonist was portrayed as a diabolical figure with no remorse.
- The plot revealed a diabolical conspiracy that threatened the safety of many.
- His diabolical manipulation of others left a trail of devastation.
2
(of a plot, idea, scheme, etc.) extremely evil and clever
3
exceptionally unpleasant or bad