Fiendish (7)
'fiendish' is the definition.
(synonyms)
This is all the clue.
(Other definitions for satanic that I've seen before include "Diabolic" , "Hellish" , "Nick's" , "Fiendish" , "Devilish (as Blake's 18)" .)
'fiendish' is the definition.
(synonyms)
This is all the clue.
(Other definitions for demonic that I've seen before include "Fiendish or satanic" , "As if possessed by devil" , "diabolical" , "Like evil spirits" , "Cruel like the devil" .)
'fiendish' is the definition.
(synonyms)
This is all the clue.
(Other definitions for diabolical that I've seen before include "shocking" , "Disgraceful" , "Demonic" , "evil" , "iniquitous" .)
'fiendish' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for evil that I've seen before include "Morally objectionable behavior" , "Malignant" , "Wicked - social problem" , "Malign" , "Depravity, wickedness" .)
'fiendish' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for devilish that I've seen before include "Very difficult to deal with" , "Very wicked" , "naughty" , "Diabolical" , "Mischievous; rakish" .)
'fiendish' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for diabolic that I've seen before include "Devilish" , "Extremely cruel" , "Fiendish and cruel, like Old Nick" , "wicked" , "Satanic" .)