Of or relating to the Devil or a devil; originating in or involving the Devil or a devil. Also: like or characteristic of the Devil or a devil…

= fiendish, adj.

Having the evil qualities of the serpent; pertaining to the Serpent as the tempter of humankind; diabolical, Satanic; devilishly wily or cunning.

Of a person or being: of the nature or character of the Devil or a devil; that acts or behaves like a devil; diabolical, fiendish; evil, wicked.

Reminiscent or characteristic of a devil in nature or behaviour; devilish, fiendish; evil, wicked.

Reminiscent or characteristic of a devil in nature or behaviour; appropriate to a devil; devilish, fiendish; evil, wicked.

Characteristic of or resembling the Devil; devilish; = satanic, adj. 2.

Characteristic of, befitting, or reminiscent of Satan in nature or behaviour; diabolical, devilish, fiendish; wicked, evil, cruel.

Like a serpent; = serpentine, adj.

Resembling a fiend.

= serpentine, adj. 2.

Transformed into a devil; made devilish or wicked. Also: portrayed as a devil.

Resembling, characteristic of, or befitting a demon; devilish, fiendish; malevolent, evil; = demonic, adj. 2 Cf. demoniac, adj. 3.

Characteristic of or befitting a demon; devilish, fiendish; malevolent, evil; = demonic, adj. 2. Cf. demoniacal, adj. 3.

= devilish, adj. (in various senses).