1. Devilish; extremely malicious; outrageously wicked. See Devil.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• dialic,
• diabtic,
• diabedic,
• diabteic,
• diabolicle,
• diabeic,
• diabitic,
• diabolo,
• diablolic,
• dibolic,
• dyabolic,
• diabolik,
• diabolical,
• diabolicel,
• diabolim,
• diabolistt,
• diabolast,
• datolit,
• dibassic,
• diabolery

• diabolise,
• diabolist,
• Diblasi,
• diabolism,
• diabolize,
• diabetic,
• diabolical,
• metabolic.

The adjective form of the word "diabolic" is "diabolical".

The plural form of the word "diabolic" is "diabolics".

The singular form of the word "diabolic" is "diabolic".