diabolical

1 of 1adjective

/ˌdaɪəˈbɑlɪkəl/

Forms:more diabolical,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.

Synonyms:

vicious infernal hellish black corrupt diabolic unholy nefarious villainous dark evil corrupted vile fiendish depraved putrid demonic malevolent wicked satanic immoral beastly sinful malicious sinister

2

(of a plot, idea, scheme, etc.) extremely evil and clever

Synonyms:

diabolic mephistophelian mephistophelean devilish

3

exceptionally unpleasant or bad