Diabolical
/[ˌdaɪəˈbɑlɪkəɫ]/ adj, slang
adj, slang ·Common ·High school level
Definitions
Adjective
- 1 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[…]"
- 2 Extremely wicked or cruel.
"a diabolical plan"
- 3 (Devilishly) cunning or devious. slang
- 4 Crazy, wild (sometimes especially due to being unexpected or surprising). slang
Adjective
- 1 extremely evil or cruel; expressive of cruelty or befitting hell wordnet
- 2 showing the cunning or ingenuity or wickedness typical of a devil wordnet
Example
More examples"We exorcise you, every unclean spirit, every satanic power, every incursion of the infernal adversary, every legion, every congregation and diabolical sect."
Etymology
From diabolic + -al.
More for "diabolical"
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.