“Vulpine” (from the Latin “vulpīnus” for “foxlike”) invokes the image of the fox, a diligent predator known for its craftiness. The similar word “lupine” describes a relation to wolves. Even when not referring to the animals specifically, the adjectives invoke the traits associated with wolves and foxes. “Lupine” often describes ravenous hunger, and “vulpine” points to a crafty cunning.