Bible Dictionaries
Diabolical

Webster's Dictionary

(a.) Pertaining to the devil; resembling, or appropriate, or appropriate to, the devil; devilish; infernal; impious; atrocious; nefarious; outrageously wicked; as, a diabolic or diabolical temper or act.

Bibliography Information
Webster, Noah. Entry for 'Diabolical'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​d/diabolical.html. 1828.