Of or concerning the devil: devilish, satanic.
[…] the many diabolical names assigned to boiling springs and to torrents that become dangerously swollen. In California the boiling springs called 'Devil's Tea-kettle' and 'Devil's Mush-pot' repeat the 'Devil's Punch-bowls' of Europe[…]
Extremely wicked or cruel.
a diabolical plan
Devilishly) cunning or devious.
From diabolic + -al.
Select a language to see translations