serpentine

Of or resembling a serpent, as in form or movement; sinuous.

Subtly sly and tempting.

Relating to or derived from serpentine or soil containing serpentine.

Any of a group of greenish, brownish, or spotted minerals, Mg3Si2O5(OH)4, used as a source of magnesium and asbestos, and in architecture as a decorative stone.

To wind like a serpent; move sinuously like a snake; meander; wriggle.