Bible Dictionaries
Mephistophelian

Webster's Dictionary

(a.) Pertaining to, or resembling, the devil Mephistopheles, "a crafty, scoffing, relentless fiend;" devilish; crafty.

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